MyPaint 0.8.2 released with a fix to pick strokes
A bug that was making MyPaint creating extra layers from picked strokes was fixed same day it was discovered (by a user of our russian version's forum).
So a new version of MyPaint is released to feature this fix. The new version is available for downloading here. Meanwhile the team is working hard on the new version that's going to have lots and lots of improvements and new features.