Well I do normally get to log into the game less than an hour after maint has finished so perhaps that's the reason I never seem to have any trouble. Except for the server crashes they had last event I have not had a serious issue with the game for about 12 months and I only clear my cache when there is an issue. As an IT professional I can confirm that your own PC does make a difference to things like this and that a clean machine causes far less problems than one you have not cleaned in a while (software wise, not physically tho that helps sometimes as well).