If there is a problem with the forum our hosting or anything else I usually get about a hundred emails from members in just the first day.
I have had no notices of anyone else having problems other than when trying to log on after being away from the site for over a year. This is an internal permissions setting of the forum and not a problem.
A possible reason for the problem you describe is the cookie and other settings that you have on your browser. Some browsers are real touchy about sites that have as many photos as X Marks. Other browsers don't like the vBulletin format cookies.
What browser are you using to access X Marks?
Bookmarks