We have been testing since pre-release (Sun is a business partner), and we have not run into any problems yet. Mostly have tested that our applications, the compiler (Forte 6) and Oracle 8.1.7 client. Have not yet installed a full Oracle DB, but will probably be installing Oracle 9.2 within a couple of weeks. Will let you know results, if you like.
Our application is dynamic - binaries and some shared libraries are pre-built, some shared libraries can get modified and rebuilt. Application runs fine whether built on Solaris 7 or 8. And no problems mixing the pre-built shared libraries with re-built one from Solaris 9.
- Several new features geared toward clustering/HA.
- SunScreen (firewall) is now built in.
- Solaris volume manager (in SMC) is new.
- JDK 1.4 (64-bit JVM) is standard.
Those were the highlights for me, but there are a few others. I cannot say anything bad about the release.