Partition will not unmount

[wb4mle]

My woody/ kernel 2.3.pre5 fails to unmount the /usr partition with:
umount2: Device or resource busy.
Tried umount -f /usr and get Device Busy error. Computer will shut
down and run check on the /usr partition on next boot.
ps shows only bash and tty. Thanks!
-- 
Eddie Seymour, WB4MLE
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