yum Segmentation fault

Hi,

When i use yum for update or check-update, it frequently ended with "Segmentation fault". Most time, this was corrected after reboot the system.

my kernel is  2.6.18-1.2257.fc5 and yum is  yum-2.6.1-0.fc5

how to fix it?

below is yum update messenge:


Loading "installonlyn" plugin
Loading "downloadonly" plugin
Setting up Update Process
Setting up repositories
dries                                                                [1/4]
updates                                                              [2/4]
core                                                                 [3/4]
extras                                                               [4/4]
Reading repository metadata in from local files
Excluding Packages in global exclude list
Finished
Segmentation fault



thanks
Yuandan