The question in
http://forums.veritas.com/discussions/thread.jspa?threadID=58682&messageID=4444393#4444393
has the status answered. But this issue is not solved (for me). So I want to reopen this. I already opened a support case.
I have the same problem with OWA2003. I have it at a customer site as well in my test environment. Both Enterprise 6.0 SP2. I have tried and rechecked all you described above. Nothing will solve the problem. I reinstalled OWA extensions, rechecked permissions, use different useraccounts, restart IIS on both servers etc.
Regards,
Focco