remount problem - device busy

[Vladimir Mitiouchev]

Hello!
DragonFly, PREVIEW from Monday.
/dev/ad0s2g mounted on /usr, ro
/dev/ad0s2i mounted on /usr/sources,ro
/dev/ad0s2j on /usr/pkg, ro
When i try to remount anything rw mount says that device is busy.
fstat says that no process is in /usr/sources.. mount -f does not
help.
I can remount / rw, it works without problems.
It's strange, isn't it?
--
Sincerely Yours,
Vladimir Mitiouchev