Overseer - MCI MIDI?

I was just wondering if Overseer uses MCI for MIDI playback or the newer Directshow interface. If it is MCI, then I've just found a very interesting article on the Virtualdub homepage pointing out peculiarities in MCI MIDI behavior in Windows XP.

http://www.virtualdub.org/blog/pivot/en ... id=77#body

Any coding experts out there want to offer any opinion?