Given MS's history of how they have released WBS (and your current version of Project), I'd stick with what you have (unless you want to upgrade to p2013).
al
Well given that with my current configuration I appear to be unable to produce a WBS diagram (something I am being asked for) I am not sure sticking with what I have will exactly work. :)
Upgrading project is an option, if it is the only one. If there is another way to create a WBS diagram from either Project or within Visio (given my current setup) I would welcome those suggestions as well.