I have the same problem as the initial poster in Edgy.  If I add a
BrowsePoll line in my cupsd.conf, cupsd starts eating all the CPU it can
get.  If I remove the line and restart, it goes back to normal.

The server pointed to by the BrowsePoll line works fine, which I
verified by running "CUPS_SERVER=<thehost> lpstat -a".

Also, when I stop cups,  I get a "cups-polld" run by root that doesn't
go away. Why does that process have to run as root.

stracing shows that cupsd is doing a lot of select().  The cups-polld
seems to be actually talking to the other server.

This is the output of "dpkg -l cups\*"

un  cups           <none>         (no description available)
un  cups-pdf       <none>         (no description available)
un  cupsomatic-ppd <none>         (no description available)
ii  cupsys         1.2.4-2ubuntu3 Common UNIX Printing System(tm) - server
ii  cupsys-bsd     1.2.4-2ubuntu3 Common UNIX Printing System(tm) - BSD comman
ii  cupsys-client  1.2.4-2ubuntu3 Common UNIX Printing System(tm) - client pro
ii  cupsys-common  1.2.4-2ubuntu3 Common UNIX Printing System(tm) - common fil
ii  cupsys-driver- 5.0.0-2ubuntu2 printer drivers for CUPS
pn  cupsys-driver- <none>         (no description available)
ii  cupsys-driver- 5.0.0-2ubuntu2 printer drivers for CUPS
un  cupsys-pstoras <none>         (no description available)
un  cupsys-pt      <none>         (no description available)

-- 
cupsd pushes the pedal to 99% when restarting
https://launchpad.net/bugs/30965

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