I'm really hoping they've improved SMBX file services for Windows in this release. When they replaced Samba with the homebrew version it was something of a disaster at my cross-platform lab--there are issues with Acrobat and some Office documents that were effectively impossible to work around, and I ended up needing to fall back to disabling SMBX and installing Samba. I'd much rather use the built-in solution, though.
So do I, So do I...
On setups with the Adobe PDF problem, I changed a few settings on each Windows client's Registry which changes a timeout... and it basically patches the problem.
If you search for it... you will find it. Not sure about any Office problems that I recall. But do recall Quickbooks for Windows problems.
Crossing fingers that the SMB will be improved to something we can recommend. Argh!