This forum uses database-driven session IDs in addition to cookies. Are cookies enabled on your opera browser? Similar problems have been known to occur with certain proxies (due to something with session IDs not being able to track an IP behind a proxy server).
You mentioned this problem doesn't occur with other forums. Have you tried any other forums backed by the phpBB forum software (www.phpbb.com)?
cscgal
The Queen of DaniWeb
19,420 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229
One more question: when you say you can't log in, do you get an error saying "Invalid Session ID" upon logging in, or does it just throw you back to the index page without logging you in or giving you any messages.
cscgal
The Queen of DaniWeb
19,420 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229
Tekmaven
Software Architect
1,274 posts since Feb 2002
Reputation Points: 322
Solved Threads: 28
Tek, if I remember correctly, you used to use Opera, didn't you?
cscgal
The Queen of DaniWeb
19,420 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229
I confirm; Opera 7.11 login is bugged.
Tekmaven
Software Architect
1,274 posts since Feb 2002
Reputation Points: 322
Solved Threads: 28
Problem fixed. It was related to a mod I had incorporated into the back-end of the site which doesn't give site IDs to bots such as google and other search engines when they spider the site. (Because search engine bots such HATE session IDs and therefore refuse to index sites with session IDs). However, for some reason the website was considering Opera to be a bot, and therefore treating you the way it would a search engine.
cscgal
The Queen of DaniWeb
19,420 posts since Feb 2002
Reputation Points: 1,474
Solved Threads: 229