As you can tell from the post title, I cannot print from anything Mozilla while running as a non-root user. I can print from anything else including the command line (OO, AbiWord....) while running as a non-root user. I'll list some important information below pertaining to permissions. I appreciate any advice you can give.

Debian Sid
CUPS+Gimp-Print v4.2.7
usb Epson CX5400 (scanner / printer)

amdxp:/dev/usb# ls -alh lp0
crw-rw---- 1 root users 180, 0 Jul 3 13:58 lp0

Aug 25 19:43:44 localhost kernel: lp0: using parport0 (interrupt-driven).
Aug 25 20:33:32 localhost kernel: drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 2 if 1 alt 0 proto 2 vid 0x04B8 pid 0x0808

amdxp:/proc/bus/usb/001# ls -alh 003
-rw-rw---- 1 root scanner 73 Aug 25 23:35 003

Anything else I should post?

Oh and the output from error_log
] ProcessIPPRequest: 8 status_code=1
d [26/Aug/2004:00:58:15 -0700] ProcessIPPRequest: Adding fd 8 to OutputSet...
d [26/Aug/2004:00:58:15 -0700] WriteClient: Removing fd 8 from OutputSet...
d [26/Aug/2004:00:58:15 -0700] PID 7042 exited with no errors.
d [26/Aug/2004:00:58:15 -0700] DeleteCert: removing certificate for pid 7042
d [26/Aug/2004:00:58:15 -0700] WriteClient: 5 2048 bytes
d [26/Aug/2004:00:58:15 -0700] ReadClient: 8, used=0, file=-1
d [26/Aug/2004:00:58:15 -0700] ReadClient: httpGets returned EOF...
D [26/Aug/2004:00:58:15 -0700] CloseClient: 8
d [26/Aug/2004:00:58:15 -0700] CloseClient: Removing fd 8 from InputSet and Outp utSet...