Mac OS10.6.4 is out

Not brave but vigilant (always have backups of systems etc)

Working very well here... Even lets me launch ProTools if Logic is already running. (Logic - RME FF800 / and ProToolsLE8.0.3cs2 with 003R).
I was having previouslty, all sorts of FW bus relaunching issues when either app was launched.

So going well here!