I have a really strange problem, some users cannot access my site collection root site, they get a sharepoint error "Access Denied". The event gets logged as shown next in the windows event viewer:
Event ID: 1314 Category: Web Event Event Message: An Unhandled access exception has ocurred.
And it then goes on to show the user login, the account the app pool is running under and some other information.
EDIT: Needless to say, the aforementioned users have the necessary privileges to access the site.
The only way the users can get access is granting them site collection admin permissions, which is not acceptable.