EDIT AGAIN:
I was wrong (again).
My client (new 1.10.1) will not start.
I started it, it runs in the background for a while then just stops. It is still in the background but uses no more memory or CPU. I have uninstalled and reinstalled both SL and drivers, I have uninstalled almost all other programs... please help!
More info here: /111/5b/110772/1.html