Re: Cups seems broken under 12.04 LTS...
@kf7nnz, on the main CUPS web interface page, just click the View Logs and select Error Log, or something like that (I am not at the PC where I use CUPS, right now). It will give you plenty of info that could be used for a bug report.
Also, is your printer direct connected or networked? If it is networked, you probably need package cups-bjnp, or something closely related to it. I had to get it from a Launchpad PPA.
Cyberpower PC, Core i5 2500 3.3 gHz, 8GB DDR3, ATI 6770 1GB, Samsung BX 2440 LED 1080p, 1 TB SATA III, 2 TB SATA III, Siduction Linux 64-bit