Group policy issue in certain rooms
We are experiencing a strange group policy problem. We have a number of policies, which are applied to different ICT rooms as needed (some are managed software installation, others config etc). In most locations, all GPs work without any problem. However, in two locations, we are getting sporadic application of the policies - mainly the software installation ones. It's happening with two different makes of machine (so not the PC hardware, network cards, etc), and the links between the rooms and the main core of the network are both minimal (at most two hops).
If we bring one of the affected machines in to another location (where this problem isn't apparent), then the GPs apply instantly. We think this may be something to do with the switches - both of these affected locations have new switches; they're the same make as the others (3com), but newer models. Can anyone think of any switch config that might cause this problem?! General network comms aren't affected... weird!!
Many thanks in advance!