Comment 2 for bug 670767

Sorry for the wait. But upon further inspection, I've realised that it might not be adjusting the transparency that did it. I went to what seems to be the root of the issue, and found:
Open pinta, create new layer. Make a selection (I used the box selection tool) in that new layer, then move the pixels. After this, once I tried to make the layer non-visible, it brought up the blank error box and crashed. This was the terminal output:
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose
Cairo.Context: called from finalization thread, programmer is missing a call to Dispose

I am using Pinta 0.5, and I upgraded from ppa:moonlight-team/pinta. I am using Ubuntu 10.10.