Yeah.. thats pretty much a fix-all if its cookie-related.
The problem we have been having causes the cookie errors.
My hypothesis:
A lot of times, if you notice the address bar, it will say (chevroletforum.com/forum/index.php) on the home screenand it should say (
www.chevroletforum.com/forum). Most browser view the missing (www) & addition of (/index.php) in address as a whole different site, so it catalogues your cookies as such.
The end result is you will no longer be logged in if this happens.