Is there something I'm missing?
TMK, it does it itself. D3D doesn't 'really' support triple-buffering, so either a game has to support it natively, or you need to use D3DOverrider, which can sometimes have a negative overall performance impact (luckily, not often),
if it doesn't. OTOH, it's Gamebryo
and from Bethesda, so it wouldn't be beyond belief that D3DOverrider's implementation could be better

.
Hell, I play every game derived from this engine and NEVER had a single issue/crash/bug with my last 3 setups that used ATI and nVidia cards, AMD and Intel CPUs andmany different motherboards.
I have a very hard time believing that, unless you played the Bethesda games as short linear CRPGs, and didn't give them the hundreds of hours they need (what if the broom dungeon is in that little unexplored hole in your world map?). Even my friends who played them on consoles had, and some still have, issues (kind of rules out the hardware and drivers theory). Bethesda has creative talent, and a company culture that cultivates it well, but that is not sufficiently backed by quality development practices, IMV.