I removed hildon-theme-alpha to make rootfs space to be able to install cssu. Any chance you did that too? because after installing the cssu I had the exact same problem which got resolved by reinstalling the theme. By the way modest has not crashed once for about 24 hours EDIT: And I have been working with speedpatch (from repos) and CSSU flawlessly since release (16.5) I am waiting for more gps feedback before I go 16.8 because I use none of the programs the fixes affect but rather use gps very much.