Almost everytime I start TD:U, my graphics are going crazy. thats why i started changing graphics etc. which made me found out that you easily can get the 'bug' problem away just by going: options - video - change the number of Hz (Hertz) to any u want. press Confirm and press : NO' at 'change settings back' hope it helps, goodluckALT + TAB is also a possible way to fix it, but thats not working to me