try runing it off the Gxl2DX8 dll see if it still crashs

does your system have occasionaly any other unexplained crashs? playing games/videos/music?

None that i dont know the explanation to, no. Ok, unexplainedly, it stoped crashing after comming out of fullscreen preview... however MED is slow to update (it still shows the preview inside the MED bounds for about 10 seconds after I click inside MED).

well, best i can guess at is either something running in background ( associated to video or audio(which sometimes conflicts video) ) is causing a drag on your video

or you have a hardware problem ( bad RAM or video RAM registers). that ram your using thats rated higher than your motherboard could be the cause too

I dunno if this helps but the reinstall of directx will only reinstall "needed" components unless you use the redist version , in which case it will reinstall all the components again. I found this out the hard way with a fouled directx install. Couldn't correct it until I found out the redist must be used for a complete rewrite of directx. You should be able to get it from microsoft.com/directx, or something similar. Can't be hard to find.

Hope this helps!

Best regards, and BE GOOD!
Scyre