Just started happening. Using Opera browser, when I read a subject the forum software tells me I am a guest and to log in. I go to log in and the same page keeps refreshing and I do not get an option to put in my username.
If I go to edit my profile, I am then automatically logged in. If I then go back to the index, I have been logged back out again.
Using FF to make this thread.
Suppose I am asking if any changes have just been made to the forum?

Ignore. Cleared all my cookies and it's ok now.

Had the same issues with firefox and Xubuntu...and yeah clearing the cookies solves that problem.