CentOS 5 and Nvidia chipset
There are lots of reports of issues with CentOS 5 and the newest Nvidia chipset. The biggest one that I have found is the network settings are forgotten on each reboot. So, if you set your machine with a static IP only to find when you reboot the machine switches to DHCP mode, then here’s a simple and easy way to fix (note: the proper fix would be to recompile the network card drivers, however this is a bit time consuming).
The simple fix is to turn off Kudzu. From the command line type:
chkconfig --levels 345 kudzu off