[CentOS] Problem with NFS4 and CentOs 5.8

Hi,

I hope someone could give me help with following problem on centos 5.8 
kernel and nfs4.

On server i have bind mounted directory shared to the client with 
following setup:
mounted directory:
     /srv/nfs/imagetest on /exports/imagetest type none (rw,bind)

/etc/exports file:
     /exports        
10.0.4.0/24(ro,insecure,sync,wdelay,no_subtree_check,no_root_squash,fsid=0,crossmnt)
     /exports/imagetest 
10.0.4.20(rw,insecure,sync,wdelay,no_subtree_check,nohide,no_root_squash)

On client I have mounted it with following command:
     10.0.4.2:/ on /media/nfs type nfs4 
(rw,nodev,sync,proto=tcp,retry=10,rsize=32768,wsize=32768,hard,intr,addr=10.0.4.2)

This works fine with kernel: 2.6.18-274.17.1.el5.centos.plusxen

But with 2.6.18-308.1.1.el5.centos.plusxen I get the following error:
     -bash: cd: imagetest/: Not a directory when accessing the share.

If I disable nohide-option I can access the directory, but with the 
contents of the original /exports/imagetest without the mounting.

Greetings,
-vpk