I'm involved in a project that is being designed and architectured by a fairly big agency and they have just completed the wireframes. However, I have some reservations in how they have designed the navigation:
They have outlined a horizontal primary navigation with drop downs, and on child pages they have a right hand vertical nav with essentially the same links as in the drop downs.
I've seen some large sites implement this style of nav: http://www.box.net/home/ however I really feel like it breaks some fundamental UX rules (although I haven't done any UX design in about 10 years).
Is this a bad approach? How can it be improved?
EDIT: Sorry I didn't articulate my real concern well enough. I'm particularly worried about the duplication of sub navigation ie. It is represented on the right hand side AND in the drop down on 2nd tier pages (exactly like http://box.net). Shouldn't it just remain consistently in one spot; the drop down? I wasn't particularly concerned whether a right or left vertical nav is better/worse.