My signature doesn't show. I have posted five messages and have double-checked to make sure that the "Show Signature" box is checked, as it is now. My signature showed on, I believe, the first two messages I posted after the new software was installed. Curiously, it shows on the "post preview" page, but we'll have to see if it is again missing from the final post. Have you added a command not to show signatures if they exceed a certain number of lines? Or is this possibly because I have disabled cookies on my PC? They have always been disabled, so this has not changed between my first posts and now.

I thought it was just me Im having the same problem it worked at first but not now :(

Problem sorted, all working (Hopefully). We're using an optimized version of showthread.php so there may be a bug or two to iron out.