Hooked and Crash,
Yes, there was a change in the way the software deals with signatures. The length of the sig line was decreased. The change was made because too many people started running advertisements in their sig lines, listed EVERY plane they owned, or just were taking up too much room. It took up server space, and made the threads harder to read. There were reduced to a size that should still allow for a good signature, but cut out some of the crap.

Hope this helps.