Description of problem:
yum has troubles to read development-source repository, although curl sees it
without problems. IMHO, there is no http cache involved and I made yum clean all
 just before running this:

sh-3.1# curl -O
http://download.fedora.redhat.com/pub/fedora/linux/core/development/source/SRPMS/repodata/repomd.xml
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   951  100   951    0     0   2674      0 --:--:-- --:--:-- --:--:-- 59437
sh-3.1# less repomd.xml 
sh-3.1# ls -lh
total 24K
drwxr-xr-x 2 root root 4,0K led  2 12:04 headers
drwxr-xr-x 2 root root 4,0K led  2 12:04 packages
-rw-r--r-- 1 root root  951 led  2 12:17 repomd.xml
sh-3.1# yum --enablerepo=development-source,development list totem\*
Loading "skip-broken" plugin
Loading "protectbase" plugin
Loading "rhnplugin" plugin
Loading "changelog" plugin
Loading "priorities" plugin
Loading "installonlyn" plugin
Setting up repositories
rhel-i386-client-5-beta   100% |=========================|  951 B    00:00     
http://download.fedora.redhat.com/pub/fedora/linux/core/development/SRPMS/repodata/repomd.xml:
[Errno 14] HTTP Error 404: Not Found
Trying other mirror.
Error: Cannot open/read repomd.xml file for repository: development-source


Version-Release number of selected component (if applicable):
yum-3.0.1-4.el5

How reproducible:
just now tried 5 times and yum always failed.

Steps to Reproduce:
1.see above
2.
3.