Problem deleting post

Trying to clear out a few posts from my forum and when I try and delete the post, I just get the following (relatively unhelpful) error:
"General Error
An Error Occurred"
in modcp.php, where I assume the delete routine is. Tried reverting it back to the pre .20 update and still get the same error.
Any ideas?
[update]
Fixed it - looks like the original phpbb security upgrade file I got was incomplete and didn't have the modified templates or language files. Updated to the new one and all fixed <img>
"General Error
An Error Occurred"
in modcp.php, where I assume the delete routine is. Tried reverting it back to the pre .20 update and still get the same error.
Any ideas?
[update]
Fixed it - looks like the original phpbb security upgrade file I got was incomplete and didn't have the modified templates or language files. Updated to the new one and all fixed <img>