Small problem: Your session timed out while posting.

Occasionally when trying to post a reply in a topic using the Quick Reply box on the bottom of the thread, I get a message saying:Your session timed out while posting. Please try to re-submit your message.I resubmit it and it works, so it's not a big problem. I'm just curious what is happening. Is there some sort of Cookie that disables the quick reply after I'm idle reading the topic for too long?Some info:
I'm using Firefox 3.0.8
I have Windows XP Professional SP3.

Yes, there exists time outs, or if for example your IP changes which it might if you wait a long time with posting. It's for security reasons and it's not being changed.

Alright, just making sure I wasn't breaking anything :)

I've had this seconds after I've entered the topic. In that situation it just seems to be SMF misbehaving.

I get it every now and then, no biggie really.Usually theres a 15 minute "inactivity" time-out period in SMF, at least this forum retains your post...