A Faulty Patchset
One of the members of the oracle-l email list just posted up that 10.2.0.3 is a non-functional patchset for Solaris SPARC 64-bit if you are using Veritas VxFS for datafiles. I just checked Metalink and found that this is Oracle Bug 5747918 covered in Metalink Note: 405825.1.
According to the email on oracle-l:
Oracle Server – Enterprise Edition – Version: 10.2.0.3 to 10.2.0.3
Oracle Server – Standard Edition – Version: 10.2.0.3 to 10.2.0.3
Solaris Operating System (SPARC 64-bit)
Oracle Database Server 10.2.0.3
Sun Solaris Operating System
Until a patch for this bug is available, or 10.2.0.3 for Solaris is re-released, you should restore from backups made before the attempted upgrade. Do not attempt to upgrade again until a fix for this issue is available. Bug:5747918 is published on Metalink if you wish to follow the progress.
I’d stay with 10.2.0.2 I think.