Cups/lpr returns "Request Entity Too Large"
I just solved the problem on my OpenSuSE 11.1.
lpr was giving me "Request Entity Too Large", with no other indication, what could be wrong. Not even in syslog I found something.
When I straced cupsd I found out, that for some reason, all of my spool directories had been mounted read-only after the last reboot. After remounting them rw printing works again. Hope that helps to somebody with the same problem.