I getting almost the exactly the same problem since I've upgraded from breezy to dapper.
I've also noticed that once a constant amount of network traffic between the printer and the ubuntu PC which continues until I kill the processes owned by cupsys printing for user pjc. http://192.168.1.201:631/EPSON_IPP_Printer 104 pjc 1 Resolution=600x600dpi PageRegion=A4 InputSlot=Default Halftoning=Grayscale PageSize=A4 orientation-requested=3 sides=two- sided-long-edge job-uuid=urn:uuid:1c49cbe7-eddd-3010-7484-77f2db4390f6 -- ipp jobs not purged; purging causes 100% cpu usage https://launchpad.net/bugs/43352 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
