I've tried both the x86 and x64 versions of Ubuntu 10.04 and installed the current Nvidia hardware drivers on both. Everything works fine until I enable SLI with the --sli=AFR or --sli=On
Once SLI is enabled there is extreme flickering relating to anything graphical. Including Compiz effects and any opengl software.
Disabling SLI returns the compy back to it's good self.
I would love to utilize SLI, however can't seem to find a solution for this bug.