I just upgraded from 4. For all intents and purposes, VMware fusion works, but when I log into my virtual machine (running XP SP3), I get the following dialog popup:
VMware Tools Core Service
VMware Tools Core Service has encountered a problem
and needs to close. We are sorry for the inconvenience.
AppName: vmtoolsd.exe
AppVer 9.61.27366
ModName: msvcr90.dll
ModVer: 9.0.39729.6161
Offset: 0006ccd5
Looks like it's a Dr. Watson because ultimately it wants to send information to Microsoft.
When I hover over the Fusion icon in the system tray, it disappears. The other thing I notice not working is cut/paste between the virtual machine and the host.