Sorry, but I disagree… You mention flashing viewports and the inability to select objects… Rijndert is clearly talking about multiple object selection and objects not highlighting when you move through the list of ambiguous objects… IMO, that’s not the same thing.
That’s not to say you’re problem isn’t any worse than his…in fact, your problem sounds a lot worse than Rijndert’s… However, I don’t know why the number of viewports has anything to do with it is a mystery. Is it only 4 viewports that cause the problem? Or is it anything over 3? What happens if you create 5 or 6 viewports? What happens if you create floating viewports…do they flash as well?
That being said, I’d rather not convolute this thread with other, unrelated issues… and try to focus on exactly one problem at a time. But if these issues do turn out to be the same, then we can continue a single thread discussion.
Thanks,