Description of problem:
yum update yields eroors. Tracked it down to bind:

yum update bind:
...

etting up Update Process
Resolving Dependencies
--> Running transaction check
--> Processing Dependency: bind = 32:9.6.1-11.P1.fc12 for package: 32:bind-chroot-9.6.1-11.P1.fc12.x86_64
---> Package bind.x86_64 32:9.6.1-13.P2.fc12 set to be updated
--> Processing Dependency: libdns.so.53()(64bit) for package: 32:bind-9.6.1-13.P2.fc12.x86_64
--> Running transaction check
---> Package bind-chroot.x86_64 32:9.6.1-13.P2.fc12 set to be updated
--> Processing Dependency: libdns.so.50()(64bit) for package: 32:bind-utils-9.6.1-11.P1.fc12.x86_64
--> Processing Dependency: libdns.so.50()(64bit) for package: dnsperf-1.0.1.0-12.fc12.x86_64
---> Package bind-libs.x86_64 32:9.6.1-13.P2.fc12 set to be updated
--> Running transaction check
--> Processing Dependency: libdns.so.50()(64bit) for package: dnsperf-1.0.1.0-12.fc12.x86_64
---> Package bind-utils.x86_64 32:9.6.1-13.P2.fc12 set to be updated
--> Finished Dependency Resolution
dnsperf-1.0.1.0-12.fc12.x86_64 from installed has depsolving problems
  --> Missing Dependency: libdns.so.50()(64bit) is needed by package dnsperf-1.0.1.0-12.fc12.x86_64 (installed)
Error: Missing Dependency: libdns.so.50()(64bit) is needed by package dnsperf-1.0.1.0-12.fc12.x86_64 (installed)


Version-Release number of selected component (if applicable):
bind-9.6.1-13.P2.fc12.x86_64

How reproducible:

Very much so :(
Steps to Reproduce:
1. yum update
2.
3.
  
Actual results:
failed

Expected results:
succeeded

Additional info:
yum -x bind -x bind-chroot -x PyQt4 -x dnsperf -x bind-libs -x bind-utils upgrade
was required to install available working updates.