Boy. This will solve one of our family debates. My son keeps complaining about how long it takes to log in and out of his XP account on the home machine, which is connected to a home domain server running Samba.
Nathan Ehresman (email@example.com ) at Taylor University in Indiana has posted a terrific article about how they solved the problem.
Interesting, I also tried the fixes he called "temporary" and didn't get very far. Now to find time to apply the other fixes he recommends.