[LAU] Udev error with CCRMA rt23 kernel

[M Watts]

On a fresh Fedora 11 install (HP nc8000 laptop, 1.6 Ghz Pentium M), the 
Planet CCRMA kernel-rt-2.6.29.6-1.rt23.2.fc11.ccrma.i546.rt freezes on 
boot with:

Starting udev: end_request: I/O error, dev fd0, sector 0
Buffer I/O error on device fd0, logical block 0

Isn't fd0 a floppy drive?  There isn't one in this machine.  There /is/ 
one across the room on a shelf -- maybe rt23 doesn't like that ;)
I disconnected all usb drives and peripheries, but no luck.

It's not a major drama, as 2.6.29.5-1.rt22.1.fc11.ccrma.i586.rt works 
perfectly, as does stock Fedora kernel 2.6.29.5-191.fc11.i586.