Originally Posted by dan at WebFlyer

If those errors happen repeatedly, try clearing out your cache and cookies and restarting the browser. If it still errors as much, try a different browser and if possible, a different connection (from work, home, etc).

Although we have heard about these errors popping up occasionally, and haven't found a definitive cause yet on the vBB boards, if it's happening all the time to you, it could be your connection.