This was probably an oversight, but the MaxJobs in cupsd.conf is set at 500 again. I think is was lowered down to 50 after the discussion in bug 376.
https://qa.mandrakesoft.com/cgi-bin/show_bug.cgi?id=376 -- /curtis ><> Mandrake Linux 9.1 (cooker) Kernel Version 2.4.20-1w4l Uptime 4 days 13 hours 27 minutes