reiserfs over nfs export problems

Hi,
i've tried to export a reiserfs volume over nfs (knfsd). First kexportfs fails with "invalid argument", and mounts are failing with a "reason given by server: Permission denied". All subsequent exports succeeded.

The same is in 2.4.18-pre1. 2.4.17 looks ok. I suspect that unexport everything before first export could also make it work properly.

-alex