[CentOS] Yum Update issues

Has anyone else run into this issue when running yum update?

[root at localhost ronb]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * rpmforge: fr2.rpmfind.net
 * base: mirror.anl.gov
 * updates: styx.biochem.wfubmc.edu
 * addons: mirrors.tummy.com
 * extras: ftp.usf.edu
Setting up Update Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running
yum-complete-transaction first to finish them.
--> Running transaction check
---> Package mjpegtools.i386 0:1.9.0-0.6.rc2.el5.rf set to be updated
---> Package perl-SDL.i386 0:2.1.3-2.el5.rf set to be updated
--> Processing Dependency: perl(Pod::ToDemo) for package: perl-SDL
---> Package SDL_gfx.i386 0:2.0.19-1.el5.rf set to be updated
--> Finished Dependency Resolution
perl-SDL-2.1.3-2.el5.rf.i386 from rpmforge has depsolving problems
  --> Missing Dependency: perl(Pod::ToDemo) is needed by package
perl-SDL-2.1.3-2.el5.rf.i386 (rpmforge)
Error: Missing Dependency: perl(Pod::ToDemo) is needed by package
perl-SDL-2.1.3-2.el5.rf.i386 (rpmforge)

I've already run yum clear all, but the problem came back when I ran yum
update again. Firefox and xulrunner were also being "held up," but I was
able to update them by running yum update firefox.

As far as I can see there is no yum-complete-transaction command.

Thanks for any pointers.

-- 
RonB -- Using CentOS 5.3
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.centos.org/pipermail/centos/attachments/20090428/2f785ab0/attachment.html>