The sames happens here and far too often. It's making it's use very annoying.
I'm just editing a photo and the it says an error has occured.
If I close and reopen Lightroom 4.1 it happens again. I need to turn the computer off to reset it.
I'm using Windows 7, wacom 4. I've updated my graphics driver and have upto date wacom driver.
It's been happening with Lightroom 4.1 RC 1 and 2 and now the full Lightroom 4.1.