My own observation is that it helps to swap between browsers, I go between firefox, chrome and I.E. (when desperate). Also depends where you log in, if you go through the facebook app or directly to topeleven.com/play.

When it comes to game play and bidding I ALWAYS use Chrome as it is much more reliable, I find Firefox loses the connection too often, usually at that crucial moment. All on the same PC(s). I can't comment on IE as I only use it in extreme circumstances and I feel dirty afterwards.