From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en) Opera 8.50

Description of problem:
I have had this problem periodically over the past few years.  Luckily it has 
always been on a dev/test box that I could rebuild (I only updated a prod server 
if there was a problem).  The scenario is the same every time.  Use up2date 
periodically to get new patches and explore bug fixes or new features.  
Eventually, an update will cause the up2date to stop working.  It will always 
hand on the http access step.  I try every browser on the machine, and none of 
them work.  Every other network/internet access works.  I have compared browser 
settings, I have compared network settings, there is no firewall running.  I 
have to boot the old kernel to gain access again.  Eventually the machine 
becomes a kernel version behind and I rebuild it.  I don't have the free time to 
continue to dig into the minutia.  I have searched Redhat, Fedora and many other 
linux related sites for similar problems.  I cannot find them.  I must be 
overlooking SOMETHING!

Version-Release number of selected component (if applicable):
unknown

How reproducible:
Always

Steps to Reproduce:
1.old build works
2.evry new build fails
3.
  

Actual Results:  no http access

Expected Results:  browsers should work, up2day should work

Additional info:

There are no errors.  The up2date just hangs, the browsers just automatically 
say "Done." in the status line at the bottom after you type in a web address.