Description of Problem:
When using up2date to update, I got an uncaught PartialReadError()

How Reproducible:
Use up2date when up2date server fails :)

Actual Results:
  File "/usr/sbin/up2date", line 1131, in ?
    main()
  File "/usr/sbin/up2date", line 388, in main
    sys.exit(batchRun(argObj.getLong("list"), pkgNames, fullUpdate))
  File "/usr/sbin/up2date", line 1077, in batchRun
    up2date.getPackage(pkg, printPkg, printRetrieveHash)
  File "/usr/share/rhn/up2date_client/up2date.py", line 1120, in getPackage
    buffer = doCall(packageSource.getPackage, pkg, msgCallback, progressCallback)
  File "/usr/share/rhn/up2date_client/up2date.py", line 400, in doCall
    ret = apply(method, args, kwargs)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 124, in getPackage
    package = source.getPackage(pkg, MsgCallback, progressCallback)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 557, in getPackage
    buffer = self._readFD(fd, size, filePath, progressCallback = progressCallback)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 509, in _readFD
    raise PartialReadError()

Expected Results:
Better error reporting