I have the same problem with the driver "Gestetner-MP_C2800_PXL.ppd" for a "MP C2800" printer and the driver "Gestetner-MP_5000_PXL.ppd" for a MP5000 when changing to jaunty.
The default driver for MPC2800 does not support color, so this is not an option. And the default driver for MP5000 does not support finisher, so no stampling of printing jobs
I have the same problem with the driver "Gestetner- MP_C2800_ PXL.ppd" for a "MP C2800" printer and the driver "Gestetner- MP_5000_ PXL.ppd" for a MP5000 when changing to jaunty.
The default driver for MPC2800 does not support color, so this is not an option. And the default driver for MP5000 does not support finisher, so no stampling of printing jobs