Using Firefox 2.0 on WinXP:
About one time in two that I want to post a reply to a thread, rather than giving me a textbox, I get a message telling me that "An error has occurred! Session verification failed. Please try logging out and back in again, and then try again." Once I have managed to successfully compose my reply, it will not post unless I first preview my post. There are boards where this is a deliberate feature, but they tend to not have a "post" button appear until after you've seen the preview, rather than it simply failing to work, so I suspect that is not the case here.
In addition, I have not yet been able to edit any details about my profile, due to the same session verification issue.
I find it hard to believe that either a) I am the only person to have these problems; or b) many people have these problems, but no-one's mentioned it yet.
So, what's up with that? Anyone got any ideas?