I've not read all of the posts on this - there are many. so I apologize if you've already gone over this. I know from what I have read that you are opposed to upgrading your computer to "fix" this because you think this is a problem that should not be relevant to your computer.

however, I would like to offer the suggestion that your video card cannot handle the situation. I saw in one thread that you have an "nvidia" video card, but I don't see which model or how much RAM it has. I would suggest that maybe the video card is not refreshing its memory specifically under the circumstances that you are providing it with RB. That could be a problem with the code in RB, but it apparently doesn't affect many people and would appear to be only specific to your current configuration and maybe a few others. maybe some code that doesn't specifically refresh the RAM on the video card of your particular video driver?

if that's the case - then it's not likely that the programmers here are going to change the code based on something they can't duplicate (according to one post I read about this). so I would suggest that you consider upgrading at least your video card to see if this problem is resolved.

Just my 2cents.