My N900 became unstable after installing CSSU-thumb. Unstable in this case means graphical problems when switching homescreens, applications not always starting, and reboots and crashes when running for example Microb.
Installation (using HAM!) went ok as far as I could see, though I did not uninstall kernel-power settings v14 until after upgrading.

After trying unsuccessfully to install Kernel-power 51r1 to see if that would fix things, the device wouldn't boot and I had to restore my backup, so it is hard to give more information now.

Any idea what caused these symptoms? Should I have installed Kernel-power 51r1 first?
I am on CSSU-T, have multiboot installed, swap on sd, running DSP settnigs at 900mhz, swappolube at settings from the 'ramzswap' thread (but not running ramzswap currently).