Originally Posted By: steveg
BTW, if I were to set up IP printing, do I have to make the same change on my MBP?
No. The IP setup only affects the mini.
And does that have any impact on printer sharing?
If you're sharing it from the mini to the MBP yes, you may have to set it up again.

If it still drops the printer move /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist to the desktop or something and reboot. That file controls Bonjour.