Try the last update again through the advanced update, maybe you have corrupt/missing files ...
Yes I think this is the best initial approach. I've just done an update from a clean Version 15 image and get no crashes here. I was concerned it was working for the team because as we were updating incrementally and a full update may have missed a component some how, but this test proves that not the case, so most likely issue is a corrupt download.
Update system.lhapps then a600gs.deb
