Almost every time BBs update homepage News section I have a bad day trying to play the game, I get a lot of 'Server Call Failed' messages and have to refresh/reload game. Some updates are better than others, I think the regular ones (Maintenance notices) are quite ok, but something really new causes lots of problems.
It lasts few hours to a day and then its working again properly.
I`m usually using Chrome browser and the Flash Player is always updated to last version available, cache cleared and browser cookies deleted often.