Using up2date-2.1.7-1 there may be a bug which causes it not to pick up 
certain upgrades for unknown reasons (I am running it with no exclusions). 
I had installed a piece of software on another Redhat 7 server which had 
just been built and updated with all the latest components; the software 
would not operate properly on the new server... the exact same piece of 
software (from RPM) had been installed on my original Redhat 7.0 box 
without problems.  I noticed in debugging the problem that the version of 
php on the new server was php-4.0.3pl1-3 checking my original server the 
version is php-4.0.4pl1-1 yet running up2date on the original server 
indicates that no updates are required/available.  Should not up2date be 
telling me that there is an update for php?