Because of physics being related to framerate? If you are talking about being unable to dodge homers that are coming right at you, I can say that bug is fixed; I've done it several times while recording.
For those interested, these runs might not end up on SDA, because of several not quite inconsiderable differences between Descent and D1X; I will continue to host all of the runs on my site, and... will actually update it now.

Edit: Site is fully updated, I think.