Hi,
is that better in firefox? it worked flawlessly for me with a resolution of 1280x800. Basically i had a div tag with a float of none and a span with a float:none. So i deleted the div and i deleted the float in the span, and hey presto, fully working in ie and mozilla! Thanks for telling me!
BTW, here is my code, the menu is from 
http://www.brainjar.com and the logo is flash. 
      <DOCTYPE><mod>= 0) {      this.isOP = true;      this.version = parseFloat(ua.substr(i + s.length));      return;   }     s = "Netscape6/";   if ((i = ua.indexOf(s)) >= 0) {      this.isNS = true;      this.version = parseFloat(ua.substr(i + s.length));      return;   }     // Treat any other "Gecko" browser as Netscape 6.1.     s = "Gecko";   if ((i = ua.indexOf(s)) >= 0) {      this.isNS = true;      this.version = 6.1;      return;   }     s = "MSIE";   if ((i = ua.indexOf(s))) {      this.isIE = true;      this.version = parseFloat(ua.substr(i + s.length));      return;   }}  var browser = new Browser();  //----------------------------------------------------------------------------// Code for handling the menu bar and active button.//----------------------------------------------------------------------------  var activeButton = null;  /* [MODIFIED] This code commented out, not needed for activate/deactivate     on mouseover.  // Capture mouse clicks on the page so any active button can be// deactivated.  if (browser.isIE)   document.onmousedown = pageMousedown;else   document.addEventListener("mousedown", pageMousedown, true);  function pageMousedown(event) {     var el;     // If there is no active button, exit.     if (activeButton == null)      return;     // Find the element that was clicked on.     if (browser.isIE)      el = window.event.srcElement;   else      el = (event.target.tagName ? event.target : event.target.parentNode);     // If the active button was clicked on, exit.     if (el == activeButton)      return;     // If the element is not part of a menu, reset and clear the active   // button.     if (getContainerWith(el, "DIV", "menu") == null) {      resetButton(activeButton);      activeButton = null;   }}  [END MODIFIED] */  function buttonClick(event, menuId) {     var button;     // Get the target button element.     if (browser.isIE)      button = window.event.srcElement;   else      button = event.currentTarget;     // Blur focus from the link to remove that annoying outline.     button.blur();     // Associate the named menu to this button if not already done.   // Additionally, initialize menu display.     if (button.menu == null) {      button.menu = document.getElementById(menuId);      if (button.menu.isInitialized == null)         menuInit(button.menu);   }     // [MODIFIED] Added for activate/deactivate on mouseover.     // Set mouseout event handler for the button, if not already done.     if (button.onmouseout == null)      button.onmouseout = buttonOrMenuMouseout;     // Exit if this button is the currently active one.     if (button == activeButton)      return false;     // [END MODIFIED]     // Reset the currently active button, if any.     if (activeButton != null)      resetButton(activeButton);     // Activate this button, unless it was the currently active one.     if (button != activeButton) {      depressButton(button);      activeButton = button;   }   else      activeButton = null;     return false;}  function buttonMouseover(event, menuId) {     var button;     // [MODIFIED] Added for activate/deactivate on mouseover.     // Activates this button's menu if no other is currently active.     if (activeButton == null) {      buttonClick(event, menuId);      return;   }     // [END MODIFIED]     // Find the target button element.     if (browser.isIE)      button = window.event.srcElement;   else      button = event.currentTarget;     // If any other button menu is active, make this one active instead.     if (activeButton != null && activeButton != button)      buttonClick(event, menuId);}  function depressButton(button) {     var x, y;     // Update the button's style class to make it look like it's   // depressed.     button.className += " menuButtonActive";     // [MODIFIED] Added for activate/deactivate on mouseover.     // Set mouseout event handler for the button, if not already done.     if (button.onmouseout == null)      button.onmouseout = buttonOrMenuMouseout;   if (button.menu.onmouseout == null)      button.menu.onmouseout = buttonOrMenuMouseout;     // [END MODIFIED]     // Position the associated drop down menu under the button and   // show it.     x = getPageOffsetLeft(button);   y = getPageOffsetTop(button) + button.offsetHeight;     // For IE, adjust position.     if (browser.isIE) {      x += button.offsetParent.clientLeft;      y += button.offsetParent.clientTop;   }     button.menu.style.left = x + "px";   button.menu.style.top   = y + "px";   button.menu.style.visibility = "visible";     // For IE; size, position and show the menu's IFRAME as well.     if (button.menu.iframeEl != null)   {      button.menu.iframeEl.style.left = button.menu.style.left;      button.menu.iframeEl.style.top   = button.menu.style.top;      button.menu.iframeEl.style.width   = button.menu.offsetWidth + "px";      button.menu.iframeEl.style.height = button.menu.offsetHeight + "px";      button.menu.iframeEl.style.display = "";   }}  function resetButton(button) {     // Restore the button's style class.     removeClassName(button, "menuButtonActive");     // Hide the button's menu, first closing any sub menus.     if (button.menu != null) {      closeSubMenu(button.menu);      button.menu.style.visibility = "hidden";        // For IE, hide menu's IFRAME as well.        if (button.menu.iframeEl != null)         button.menu.iframeEl.style.display = "none";   }}  //----------------------------------------------------------------------------// Code to handle the menus and sub menus.//----------------------------------------------------------------------------  function menuMouseover(event) {     var menu;     // Find the target menu element.     if (browser.isIE)      menu = getContainerWith(window.event.srcElement, "DIV", "menu");   else      menu = event.currentTarget;     // Close any active sub menu.     if (menu.activeItem != null)      closeSubMenu(menu);}  function menuItemMouseover(event, menuId) {     var item, menu, x, y;     // Find the target item element and its parent menu element.     if (browser.isIE)      item = getContainerWith(window.event.srcElement, "A", "menuItem");   else      item = event.currentTarget;   menu = getContainerWith(item, "DIV", "menu");     // Close any active sub menu and mark this one as active.     if (menu.activeItem != null)      closeSubMenu(menu);   menu.activeItem = item;     // Highlight the item element.     item.className += " menuItemHighlight";     // Initialize the sub menu, if not already done.     if (item.subMenu == null) {      item.subMenu = document.getElementById(menuId);      if (item.subMenu.isInitialized == null)         menuInit(item.subMenu);   }     // [MODIFIED] Added for activate/deactivate on mouseover.     // Set mouseout event handler for the sub menu, if not already done.     if (item.subMenu.onmouseout == null)      item.subMenu.onmouseout = buttonOrMenuMouseout;     // [END MODIFIED]     // Get position for submenu based on the menu item.     x = getPageOffsetLeft(item) + item.offsetWidth;   y = getPageOffsetTop(item);     // Adjust position to fit in view.     var maxX, maxY;     if (browser.isIE) {      maxX = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft) +         (document.documentElement.clientWidth != 0 ? document.documentElement.clientWidth : document.body.clientWidth);      maxY = Math.max(document.documentElement.scrollTop, document.body.scrollTop) +         (document.documentElement.clientHeight != 0 ? document.documentElement.clientHeight : document.body.clientHeight);   }   if (browser.isOP) {      maxX = document.documentElement.scrollLeft + window.innerWidth;      maxY = document.documentElement.scrollTop   + window.innerHeight;   }   if (browser.isNS) {      maxX = window.scrollX + window.innerWidth;      maxY = window.scrollY + window.innerHeight;   }   maxX -= item.subMenu.offsetWidth;   maxY -= item.subMenu.offsetHeight;     if (x > maxX)      x = Math.max(0, x - item.offsetWidth - item.subMenu.offsetWidth         + (menu.offsetWidth - item.offsetWidth));   y = Math.max(0, Math.min(y, maxY));     // Position and show the sub menu.     item.subMenu.style.left          = x + "px";   item.subMenu.style.top            = y + "px";   item.subMenu.style.visibility = "visible";     // For IE; size, position and display the menu's IFRAME as well.     if (item.subMenu.iframeEl != null)   {      item.subMenu.iframeEl.style.left      = item.subMenu.style.left;      item.subMenu.iframeEl.style.top       = item.subMenu.style.top;      item.subMenu.iframeEl.style.width    = item.subMenu.offsetWidth + "px";      item.subMenu.iframeEl.style.height   = item.subMenu.offsetHeight + "px";      item.subMenu.iframeEl.style.display = "";   }     // Stop the event from bubbling.     if (browser.isIE)      window.event.cancelBubble = true;   else      event.stopPropagation();}  function closeSubMenu(menu) {     if (menu == null || menu.activeItem == null)      return;     // Recursively close any sub menus.     if (menu.activeItem.subMenu != null) {      closeSubMenu(menu.activeItem.subMenu);      menu.activeItem.subMenu.style.visibility = "hidden";        // For IE, hide the sub menu's IFRAME as well.        if (menu.activeItem.subMenu.iframeEl != null)         menu.activeItem.subMenu.iframeEl.style.display = "none";        menu.activeItem.subMenu = null;   }     // Deactivate the active menu item.     removeClassName(menu.activeItem, "menuItemHighlight");   menu.activeItem = null;}  // [MODIFIED] Added for activate/deactivate on mouseover. Handler for mouseout// event on buttons and menus.  function buttonOrMenuMouseout(event) {     var el;     // If there is no active button, exit.     if (activeButton == null)      return;     // Find the element the mouse is moving to.     if (browser.isIE)      el = window.event.toElement;   else if (event.relatedTarget != null)         el = (event.relatedTarget.tagName ? event.relatedTarget : event.relatedTarget.parentNode);     // If the element is not part of a menu, reset the active button.     if (getContainerWith(el, "DIV", "menu") == null) {      resetButton(activeButton);      activeButton = null;   }}  // [END MODIFIED]  //----------------------------------------------------------------------------// Code to initialize menus.//----------------------------------------------------------------------------  function menuInit(menu) {     var itemList, spanList;   var textEl, arrowEl;   var itemWidth;   var w, dw;   var i, j;     // For IE, replace arrow characters.     if (browser.isIE) {      menu.style.lineHeight = "2.5ex";      spanList = menu.getElementsByTagName("SPAN");      for (i = 0; i <spanList> 0)      itemWidth = itemList[0].offsetWidth;   else      return;     // For items with arrows, add padding to item text to make the   // arrows flush right.     for (i = 0; i < itemList.length; i++) {      spanList = itemList[i].getElementsByTagName("SPAN");      textEl   = null;      arrowEl = null;      for (j = 0; j < spanList.length; j++) {         if (hasClassName(spanList[j], "menuItemText"))            textEl = spanList[j];         if (hasClassName(spanList[j], "menuItemArrow"))            arrowEl = spanList[j];      }      if (textEl != null && arrowEl != null) {         textEl.style.paddingRight = (itemWidth             - (textEl.offsetWidth + arrowEl.offsetWidth)) + "px";         // For Opera, remove the negative right margin to fix a display bug.         if (browser.isOP)            arrowEl.style.marginRight = "0px";      }   }     // Fix IE hover problem by setting an explicit width on first item of   // the menu.     if (browser.isIE) {      w = itemList[0].offsetWidth;      itemList[0].style.width = w + "px";      dw = itemList[0].offsetWidth - w;      w -= dw;      itemList[0].style.width = w + "px";   }     // Fix the IE display problem (SELECT elements and other windowed controls   // overlaying the menu) by adding an IFRAME under the menu.     if (browser.isIE) {      var iframeEl = document.createElement("IFRAME");      iframeEl.frameBorder = 0;      iframeEl.src = "javascript;";      iframeEl.style.display = "none";      iframeEl.style.position = "absolute";      iframeEl.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)";      menu.iframeEl = menu.parentNode.insertBefore(iframeEl, menu);   }     // Mark menu as initialized.     menu.isInitialized = true;}  //----------------------------------------------------------------------------// General utility functions.//----------------------------------------------------------------------------  function getContainerWith(node, tagName, className) {     // Starting with the given node, find the nearest containing element   // with the specified tag name and style class.     while (node != null) {      if (node.tagName != null && node.tagName == tagName &&            hasClassName(node, className))         return node;      node = node.parentNode;   }     return node;}  function hasClassName(el, name) {     var i, list;     // Return true if the given element currently has the given class   // name.     list = el.className.split(" ");   for (i = 0; i < list.length; i++)      if (list[i] == name)         return true;     return false;}  function removeClassName(el, name) {     var i, curList, newList;     if (el.className == null)      return;     // Remove the given class name from the element's className property.     newList = new Array();   curList = el.className.split(" ");   for (i = 0; i <curList></script></head><body>  <Menu><span><a><img></a><a><img></a> <a><img></a><a><img></a><a><img></a><a><img></a><a><img></a><a><img><img></a><a><img></a><a></a></span></div>  <Main>  <div><div><a>Home</a></div><div></div><div><a>Computer Tutorials</a></div><div></div><div><a><span>Posting Info</span><span>▶</span></a><div></div><div><a>Your Computer</a></div></div>  </div>  <div>   <div><a>Bios/MSDos/Booting</a><div></div>         <a>Windows XP/Vista</a><div></div>         <a>Windows 95, 98 & ME</a><div></div>                 <a>Windows 2000/NT/Server</a>   <div></div>                  <a>Other OS's</a>           </div></div>  <div><div><a>PC Upgrading/Building</a></div><div></div><div>      <a><span>PC Hardware</span><span>▶</span></a><div></div>  <div><a>PC News</a>    <div></div>      <a>Hardware Reviews</a></div></div></div>  <div><div><a>Video Creation</a></div><div></div>      <a><span>WebPage Creation</span><span>▶</span></a><div></div><div><div><a>Image Creation</a></div></div><div></div><div><a>Programming</a></div></div>  <div><div>   <div><a>Spyware/Adware</a><div></div>         <a>Antivirus</a><div></div>         <a>Firewalls</a><div></div>                 <a>Spam & Email</a>      <div></div>                  <a>Security Alerts</a>               </div></div>  <div><div>   <div><a>General Internet</a><div></div>         <a>Wireless Networking</a><div></div>         <a>Hardwired Networking</a>   </div></div>  <div>   <div><a>Site & Forum Problems</a><div></div>         <a>Link Exchange W/ PCHW</a><div></div>         <a>Your Thoughts</a>   </div></div>   <Sub>   </div><div><a>Site Announcements</a>   </div></div><div>   <Sub>   </div><div>   <a>Power Supply</a>   <a>HDD/CD/DVD</a>      <a>Motherboards</a>         <a>Sound Card/Speakers</a>            <a>Graphics Card</a>               <a>Memory Ram</a>                  <a>Processors/PSU</a>               <a>Monitors</a>                  <a>External Peripherals/Devices</a></div><div>   <Sub>  </div><div>   <div>   <a>Flash</a>      <a>Dreamweaver</a></div></div></div></body><BEGIN><td>{BANNER_16_IMG}</td></tr></table><END><table><BEGIN><td> </td><td> </td><td> </td><td> </td><td> </td></tr><END><BEGIN><tr><td> </td><td> </td><td> </td><td> </td><td> </td></tr><END><BEGIN><tr><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td></tr><END>  {PORTAL_HEADER}<td><img></td><td>
Just edit the image to text if you want and the rest is so straight forward, very customizable!
MAddocks