CUPS

how the hell do you delete a print job in CUPS?

From the web UI:

client-error-forbidden

From root on the print machine:

itx:~# lpq
officejet is ready and printing
Rank Owner Job File(s) Total Size
active bradfit 326 (stdin) 519168 bytes
1st bradfit 327 (stdin) 38912 bytes

itx:~# lprm 1
lprm: Unable to lprm job(s)!

Same on my machine:

bradfitz@bini:~$ lpq
officejet is ready and printing
Rank Owner Job File(s) Total Size
active bradfit 326 (stdin) 519168 bytes
1st bradfit 327 (stdin) 38912 bytes
bradfitz@bini:~$ lprm 1
lprm: You don't own job ID 1!

Uh, I don't? I printed it from here.

Here's me hoping Project Utopia and its user/task-centric design goes somewhere.