One of the reasons I havent been active lately is that Linux Mint has a gui issue with my main working computer, a Northgate STAX2517C2 with onboard nVidia graphics. This is a general issue, not specific to XFCE. I recently downloaded Mint 6 main (gnome) and not only did the gui go dead (out of range) during boot, I am fairly certain that the computer did not get to desktop at all. I admit that I lose patience with a distro that cant keep the gui going. The preceding version of Mint at least got to desktop. Maybe I am spoiled by Puppy, current preferred distro, which will boot almost any computer.
IIRC previous versions of Mint provided a safe graphics mode as a boot option for the live CD. Even so, the gui would go "out of range" and standby during boot, and only after a considerable delay, the gui would return just before booting to desktop. While this might be temporarily acceptable for me, I couldnt pass this live CD on to another party and expect them to understand what is happening when the gui goes standby for most of the boot. I did try a few boot options, but quickly lost interest. If there is a workaround, it isnt obvious.