I had similar problems for a while, but mainly with IE and Firefox. Even after those improved, Chrome seems best choice. I do have to refresh the page after login for it to show I'm logged in, but after that it's fine. Chrome on Android phone works fine, no problems. I'll nudge Brett (DarkLord), the owner/admin, see if he'll look into it.
If you could do that that would be great. Very unfortunate that they are experiencing issues. That forum was hopping when I was painting a while back. I wonder if they started having technical issues viewership fell off.