Hey i have been having a small problem with the mastery tree. When i put my mouse over any of the skills the lil popup with what it does doesnt pop up. This is odd since each time i go in the M-tree for the first time after i signed on it works, each time after that it doesnt. Its not 100% of the time but most of the time, and sometimes after a game it will come back then go away again. This started today, it worked fine last weekend and the last 2 days.

i am running
AMD quad 2.61 ghz 9950 black
ATI HIS HD4870 1G
8gb ram
10,000 rpm HD
Vista 64 bit