[CentOS] USB issues

I am using centos5.3 x86_64 on a gigabyte GA-MA78GM-US2H motherboard.

When I insert a USB thumbdrive its detected with dmesg, I mount it and 
start to copy files.
Then I start getting errors:
sdd: assuming drive cache: write through
 sdd: sdd1 sdd2
sd 7:0:0:0: Attached scsi removable disk sdd
sd 7:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete
usb 1-5: reset high speed USB device using ehci_hcd and address 5
usb 1-5: device descriptor read/64, error -110
usb 1-5: device descriptor read/64, error -110
usb 1-5: reset high speed USB device using ehci_hcd and address 5
usb 1-5: device descriptor read/64, error -110
usb 1-5: device descriptor read/64, error -110
usb 1-5: reset high speed USB device using ehci_hcd and address 5
usb 1-5: device not accepting address 5, error -110

I have also tried connecting a USB hub into my computer and using that.
Then plugging the thumbdrive into the hub. I get the same results.

I have never had USB issues before - any ideas?

Jerry