CoteRotie
My theory is that if the GUI thread is suspended for a certain time that there's an interrupt that causes the white screen. When loading lots of samples or accessing large files, especially on slower machines or disk drives this can occur temporarily causing the white screen until the GUI thread resumes execution. So I don't think it's a problem, you should be able to safely ignore it.
Or I could be completely wrong.
John
I have it happen when opening a blank new project from time to time..but not every time
win 7 64 bit, Nvidia 1 gig graphics card, no Xray enabled