I've done something wrong?

[HailandKill]

I've set up my Yum configuration like advised on the with www.fedorafaq.org i.e. copied his. But I get this error, tather often no matter what command I enter.

Although, I have managed to install the Java Runtime enviroment.

[root@localhost ~]# yum list available
Setting up Repos
livna-stable 100% |=========================| 951 B 00:00
livna-unstable 100% |=========================| 951 B 00:00
updates-released 100% |=========================| 951 B 00:00
livna-testing 100% |=========================| 951 B 00:00
base 100% |=========================| 1.1 kB 00:00
extras 100% |=========================| 951 B 00:00
Reading repository metadata in from local files
livna-stab: ################################################## 409/409
livna-unst: ################################################## 79/79
updates-re: ################################################## 966/966
livna-test: ################################################## 3/3
Traceback (most recent call last):
File "/usr/bin/yum", line 7, in ?
yummain.main(sys.argv[1:])
File "/usr/share/yum-cli/yummain.py", line 68, in main
result, resultmsgs = base.doCommands()
File "/usr/share/yum-cli/cli.py", line 448, in doCommands
ypl = self.returnPkgLists()
File "/usr/share/yum-cli/cli.py", line 1138, in returnPkgLists
ypl = self.doPackageLists(pkgnarrow=pkgnarrow)
File "__init__.py", line 750, in doPackageLists
File "/usr/share/yum-cli/cli.py", line 89, in doRepoSetup
self.doSackSetup()
File "__init__.py", line 143, in doSackSetup
File "repos.py", line 243, in populateSack
File "mdcache.py", line 103, in getPrimary
File "mdcache.py", line 90, in _getGeneric
File "mdcache.py", line 62, in _unpickle
EOFError