Greetings, Just after the my recent migration to knownhost, one of my regular website (phpBB3 forum) users reported a problem that we can't explain and I was hoping someone here might be able to shed some light on the issue. The user's normal web surfing habit is to log in and quickly open several tabs of the new threads on my forum. This may be 10+ new tabs containing fairly large images (up to 5mb per image). This worked fine for the user on my previous host. The problem they are now reporting is that often, the site simply quits responding when they do this. The user cannot even ping the site. However, they can surf to any other website just fine. They are reporting that after ~30 minutes, the connection clears they can continue to surf my site on knownhost. We are really at a lost as to explain why this is happening. No other users on my site have this problem and no one else can duplicate the issue. Is there any way knownhost or the data center could be temporarily blocking this user's IP? Any ideas what could be happening here? Thanks!