cryptsetup is 100 times slower then in 1.0.6

hi,
my home directory is a luks encrypted volume. the key for this volume is
on my pendrive. before i'd like to login i just plug my pendrive and it
then:
- udev recognize my pendrive
- mount one of the partition on it (which hold the keyfile)
- use the keyfile on the mounted partition and open the luks partirion
- mount the device mapper as my home
- umount my pendrive
this was works perfectly on fedora 8 and takes about 2-4sec to my home
dir be mounted.
now on fedora 9 it's still works, but it takes about 3-4 minutes (!!!)
to finish. when i look into what happened:
- udev recognize my pendrive
- mount one of the partition on it (which hold the keyfile)
- use the keyfile on the mounted partition and open the luks partirion
and here waits for minutes in this place what is see in ps axf:
--------------------------------------
   522 ?        S<s    0:00 /sbin/udevd -d
  2523 ?        S<     0:00  \_ /sbin/udevd -d
  2536 ?        S<     0:00      \_ /bin/bash /root/bin/home-up
/dev/System/lfarkas
  2553 ?        S<     0:00          \_ /bin/bash /root/bin/luks-up
/dev/System/lfarkas
  2569 ?        S<L    0:00              \_ /sbin/cryptsetup luksOpen
/dev/System/lfarkas home-lfarkas
  2718 ?        S<     0:00                  \_ /sbin/udevsettle
--------------------------------------
i assume udevsettle wait for something, but i don't know for what?
and why?