We are having lots of problems with our 8560s and 8860s resetting and restarting jobs. We use them to print jobs with coupons and addresses imprinted on them so not having duplicates is important. If I send more than a few hundred to the printer it will randomly restart and then start the job over from scratch since the computer is still sending it. If I send a small enough number that the computer can dump it all to the printer then it seems to work fine. I don't appear to have this problem running from Windows 7 machines, only OSX 10.7 which is actually printing through an OSX 10.4 print server. The printers are all using TCP/IP over ethernet.