Hi Dan,
Sorry you are having trouble with your intended setup of LabVIEW.
LabVIEW has never been intended to work with roaming profiles, and so we have no information on the behaviours you might see with this setup. It is also not an intended configuration and as such is not supported.
You are allowed with the LabVIEW 8 License to install every copy of LabVIEW that you own on 3 PCs, assuming the program is only used by one user on each set of 3 PCs. This would allow a developer to have a PC on his/her desk, one in the lab and another. (Which I assume was part of the point with the roaming profile). You can then save all your LabVIEW files to a network location or into a SCC management system as long as it support the visual source safe API.
Regards
JamesC
NIUK and Ireland