I've noticed this on thefader.com. my concern is that this is a uncommon place for a subnav and will be mixed-in with ads. further, our site is pretty content-heavy. thoughts?
Left hand secondary or top secondary seems to be standard because of the order users scan a page (F-shape) but I have seen not much research to suggest right hand navigation is that much worse than left.
Navigation should be obvious and easily acquired by the user. Now, you alluded to the fact that your navigation is mixed in with adverts and the like; this might cause a degree of banner blindness and confuse the user and this is a problem. Position is not the main problem here, its the fact that you have mixed up other page elements with the navigation, and this, I think, is high risk.
summary **keep navigation elements consistent
**don't mix up with other page elements