My computers at home are eternally signed into GBS.com. I also get the e-mail notification of posts. This morning I clicked on the link in my e-mail to go to the Song Lyrics thread and ended up at the first post rather than the last, which is how my account is set up. Realized there were no reply buttons or anything. Confused, eventually figured out I was magically signed-out. Couldn't remember my password and ended up re-loading the site through my bookmark. I was magically signed back in.
I contunued on about my business, got quite a few e-mails with no problems using the links contained in them until just now. I got an e-mail saying I have a private message, clicked on the link to reply and got a 'this post doesn't exist' messge because I was signed-out again. Used my bookmark and all was ok. 
I think there's some kind of strange bug in the system. The 2 incidents happened on 2 different computers using 2 different systems.
"I see you in the front row, bouncing up and down, you're ripped and ready for a night downtown." ~ Margarita
What's wrong with a little flirtation?
Monster Tee