When I type a PM to someone I usually hit preview to check for spelling mistakes. On the preview screen it doesn't show who the PM is going to so I usually hit "back" to make sure that it is going to who I want it to go to. I have always done this because I once made the faux pas of sending a PM to the incorrect person.
When I hit "back" now the message area is blank so then I hit forward to get back to the message. When I do that the screen looks really weird and the message is gone. I try hitting "edit" and then I get this:
Server object error 'ASP 0235 : 80004005'
Server.Transfer Error
/boards/preview_redirect.asp, line 5
Invalid URL form or fully-qualified absolute URL was used. Use relative URLs