It seems that the quick access toolbar was not designed to roam around with users, which can be annoying if they like to get their customisations on…
For those that are unsure what I’m on about, here’s a non customised word 2007
and a customised word 2007
The customisations (.qat files) are not stored in the roaming part of the profile, but instead, in the local part which means it won’t work when roaming.
I found a good blog over here that describes the problem, and the solution which involves a custom group policy that enables the feature in roaming profiles.