relocation error after applying patch

Hi, there,

I installed the latest security patch for openldap [RHSA-2003:040-10].  One of
the software we're using failed to start with error :

relocation error: /opt/dcelocal/lib/libdce.so.1.0.1: Undefined symbol: fstat

The shared library in trouble depends on /usr/lib/libldap.so.2 and 
/usr/lib/liblber.so.2.  I've to revoke to previous patch level to fix the 
problem.  

I suppose the updated shared libraries in patches are backward compatible, and
shouldn't crash current applications.  Would anyon please advise?

Thanks a lot.
ST Wong ([email protected])