Voilà ce que j'ai lorsque je fais 'yum update' :
Setting up Update Process
Setting up Repos
nr-production 100% |=========================| 1.0 kB 00:00
base 100% |=========================| 1.1 kB 00:00
nr-testing 100% |=========================| 1.0 kB 00:00
updates-released 100% |=========================| 951 B 00:00
Reading repository metadata in from local files
nr-product: ################################################## 426/426
base : ################################################## 2622/2622
nr-testing: ################################################## 161/161
updates-re: ################################################## 910/910
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for libxslt-python to pack into transaction set.
http://yum.nrpms.net/fedora-3-i386/production/libxslt-python-1.1.14-1.1.fc3.nr.i386.rpm: [Errno 4] IOError: HTTP Error 403: Forbidden
Trying other mirror.
Error: failure: libxslt-python-1.1.14-1.1.fc3.nr.i386.rpm from nr-production: [Errno 256] No more mirrors to try.
