So this is my 2nd problem I've posted. Great. Okay, so I've been having so so so so so so so much bad luck with WLMM 2012, oh my gosh! I'm in the middle of making a tutorial, editing, music, blah blah blah. When I hover over the timeline, the clips just disappear and it just looks white! Like what the heck?! It just started a few hours ago and it is really getting on my nerves. My PC is clean, just cleaned it yesterday, so I feel like it's the program and not the PC's fault. 

When I hover over the white parts, it will still describe the clip and music, but where is it, and the preview screen still plays and the file still saves, BUT when I try to open it up, this is what it looks like. The preview screen plays a black screen and the timer is going. (To clarify, the first image is when I saved the "broken" file and opened it back up after closing the program. The second image is the actual problem and what happened to it.)