With absolutely no knowledge of what the "IT Minions" are doing behind the scenes, I too get logged off every few days...
I just figured it was the "Cookie" that's probably used has an expiration to help protect me so I don't stay logged in forever...
I'm ok with that.. lol
I could imagine the MODS have quicker expiration's since they have more access than users.. Minutes though??? Ehh... Not that quick I'd think... haha!
Also, when it happens more frequently than every few days, I figure it's the IT guys pushing updates to the server and invalidating the cookies....
The white screen of death though does occur quite a bit though...
Again, I figure it's updates or something happening...
Usually the site refreshes after a few minutes and I'm still logged in... Occasionally not logged in...
Again, everything I say here is PURE speculation, but it makes sense to me anyway...
In any event, as stated, it is something being worked on...
Have to say the site and forum in general is SOOOO much better than it was immediately after this last update though...