The Funny or not so funny thing about the Vue4 program and the GF4 cards is that even if you cut the opengl out and raise the 3d slider higher is in most cases it will work,sadly my machine is almost exactly alike like yours Silke,only difference being the brand name probably and i still get little white squares in the main frame if i move my mouse in that square. The advice given for the grey shapes does work,i think i asked the same question quit awhile back. So i decided to do a comparisom today on version 3 and 4 with the same machine,Vue 4 has glitches still and Vue3 runs like a champ on my machine. The big downfall tho is i don't get all the goody's we get with version4,so i guess it's a matter of whether i put up with a headache or as the lady's on the "View" sat"enjoy the Vue3". :) I still trust in the makers of this program to fix these problems and issues say in Vue5.