Description of problem:
noticed heavy cpu usage, top showed cups-polld taking 98% cpu

Version-Release number of selected component (if applicable):
cups-1.4.7-3.fc15.x86_64

How reproducible:
don't know

Steps to Reproduce:
don't know

Additional info:
strace output:
...
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
recvfrom(6, "", 2048, 0, NULL, NULL)    = 0
.....

the only change in cupsd.conf is:

# Show shared printers on the local network.
Browsing On
BrowseOrder allow,deny
BrowseAllow all
BrowseLocalProtocols CUPS dnssd
BrowsePoll cups.brq.redhat.com:631