Am Dienstag, den 05.08.2008, 18:03 +0200 schrieb Andreas Nowack:
> I found out that the usb 2.0 support is broken in kernel 2.6.9-78 (smp 
> version).
>  ...........
> If I go back to kernel-smp-2.6.9-67.0.22.EL.i686.rpm the problem with 
> ehci_hcd is gone.

Seems to be a problem with all newer kernel, see
 
   https://bugzilla.redhat.com/show_bug.cgi?id=446845