I wanted to post about my situation, partly to add my voice, partly as a way to move on to more important and less annoying issues.
I bought the CLP-315 about nine months ago. It worked flawlessly until about two weeks ago. I can't recall the order of events, but my problems seemed to begin when I installed the smart panel so that I could check on the number of print jobs and the estimated toner left. This may have been about the time I 1) replaced one of the toner cartridges, and 2) received the Samsung driver update.
Sometimes it prints every other job. Sometimes it prints once after a power cycle. Sometimes the printer makes noise for about four sections as it does when it worked, but then falls silent just when I would normally hear the paper begin to move. Other times, when I try to print, I hear a simple solenoid click, then nothing.
I wondered if it was the printer itself, until I found this discussion. Also, the printer works flawlessly if I use Bootcamp and boot into Windows XP Home.
I have tried removing Smart Panel, using Time Machine to move the Samsung files back to a month ago, and have reset the printing system multiple times. Sometimes it seems to work a few times, but eventually it either stops working with 10.6 completely or drops every other job.
Thanks,
Steve