I seem to have the same problem, however mine occurs w/the first couple and last tracks. I haven't been able to find a fix.
Someone please help, the cracking and skipping are very annoying. When I imported using iTunes in Windows there were no problems. It only seems to happen when I import using the Mac. How odd, a Mac program working better in Windows?
Info:
iTunes v4.6
PowerMac G5 (Dual 2GHz)
Thanks in advance.