I never delete the Wgt.com from flash cache... If I do that then I would have to reset all my game settings and that is not good... just trying to remember them is a pain, whth my brain...lol. I don't have any problems with the game even after a maintenance :)
Cheers
Roger
Edit... I must say I do delete all things from the cache before I log on, except for the Wgt.com.