connectathon test suite which runs nfs basic and lock tests can be downloaded from below site:
http://www.connectathon.org/nfstests.html

steps to reproduce problem:
1. set up nfsv4 server on suse linux 10.1alpha2 
2. mount nfsv4 shared paths on nfsv4 client.
3. run connectathon lock tests on nfsv4 mount.
go to connectathon top directory . run script runtests on nfsv4 mount point.
./runtests -f -l <nfsv4mountpoint>
result:
at test 10.8 lock tests will fail. Test #10 - Make sure a locked region is split properly.
        Parent: 10.0  - F_TLOCK [       0,       3] PASSED.
        Parent: 10.1  - F_ULOCK [       1,       1] PASSED.
        Child:  10.2  - F_TEST  [       0,       1] PASSED.
        Child:  10.3  - F_TEST  [       2,       1] PASSED.
        Child:  10.4  - F_TEST  [       3,  ENDING] PASSED.
        Child:  10.5  - F_TEST  [       1,       1] PASSED.
        Parent: 10.6  - F_ULOCK [       0,       1] PASSED.
        Parent: 10.7  - F_ULOCK [       2,       1] PASSED.
        Child:  10.8  - F_TEST  [       0,       3] FAILED!
        Child:  **** Expected success, returned EACCES...
        Child:  **** Probably implementation error.

**  CHILD pass 1 results: 49/49 pass, 1/1 warn, 1/1 fail (pass/total).
        Parent: Child died

** PARENT pass 1 results: 31/31 pass, 0/0 warn, 0/0 fail (pass/total).
lock tests failed