Are you sure you are using lpr and not CUPS? Do you have cups-bsd
installed perhaps?
system-config-printer - System-config-printer is a GUI written to
configure a CUPS server.
You have filed a bug against lpr, which has nothing to do with CUPS.
You also have not specified *why* no one can print. Does the printer
server stop accepting requests? Does the printer server stop
broadcasting your printer? Is it on? If it is on, do you see it? Does
the printer server see the printer (use `lsusb` when it "doesn't
work", assuming it is USB printer)
"It does not work" is clearly false as I have cups installed and it
never stopped working. It also does not tell us anything about what
could potentially be wrong.
- Adam