I have this new problem with quick selection. When I click on the icon to the left, or press q, it works fine and I can use the brush without any issues. When I have something selected, and then press q, it doesn't load the whole red and it's very choppy. I can't even use the brush it's so slow. I have a 3.6 quad core with 16 gb of ram. Maybe it's just the size of the photos? It seems like sometimes it will work, and then all of a sudden while I'm using it, it does this.
I was just wondering if anyone else has had that problem. Maybe my preferences need adjusting. The best thing might be to just re-install the program. Then again, maybe it just does that with larger files.