major problem after enabling desktop effects (F9)...

[Mike Chalmers]

After I enabled desktop effects from the system settings, a major
problem happened. First, the log in screen came up so I logged in.
After I logged in it started to boot with the splash screen and after
the splash screen was gone all I could see is a my mouse pointer and a
black background. I can't do anything! Once again all I have is a
mouse pointer and a black screen after I log in. Many thanks.