[CentOS] swap_free messages in log

This morning I noticed the following message in my log file.

swap_free: bad swap file entry 10000000
swap_free: bad swap file entry 20000000
swap_free: bad swap file entry 10000000
swap_free: bad swap file entry 20000000
a few more times...

After rebooting I no longer see it.
I have an intel 865 motherboard, 2.4 celeron,
2 - 300GIG seagate sata drives as software RAID-1.

I have had to reboot the machine sometimes
but there were never any messages on the console
or the log files.

Before my 300GIG drives I used to run 2-120GIG drives
and had the same problem. An occasional reboot fixed it.
I got new drives and I still have some issue?

Any thoughts on something to try? Thanks.

Jerry