OK, a few things I found out.

It seems that ALL Private Messages you have ever sent/received are now showing up in (Go to My Stuff and use the pull down menu items). I had to delete 17 pages worth of PM's!

Also check your preferences and Profile, as some things have changed and you I THINK now have more control.

Also it seems like you sig line can now have up to 500 Characters! I'll check this out in a sec.