Having some strange behavior just starting this morning. Couple of things... When I try and log into the ACP is brings me right back to the login screen. If I clear the cache it then lets me log in. I quit the browser and restarted the computer. Same issues after a short time. If I click the new posts button it shows new posts. I read the thread and hit new posts again and the thread I just read is still showing as new posts being there. Issues logging out and back in...kind of the same issue. I logged out and logged in with as another user and then logged out. When I logged back in as admin and hit the new post button new posts were shown and it reverted to the other user I had logged in as. Other users are reporting similar problems. How do I go about trouble shooting this? Is this a server issue? Kinda seems like it might be but I don't know what to tell the hosting company. Nothing has changed with the XF software. This just started happening this morning out of the blue Any help or advice is appreciated.