I was finally able to try it last night with a vehicle invasion map.. It would be nice to know if this is happening to other medics.. Looks like the error is exactly the same as before...I didn't think I needed the first error so I deleted it hence the broken link on the first post.
I believe I have figured something out... I believe it is due the being a dedicated server, because healing-link-gunning vehicles works fine offline, at least, for me. Input is appreciated, and I could try figuring out the problem.
You sure? I could have sworn UI crashed me doing that once... on DM-Halo2, I think... Perhaps it is map-dependent, somehow? Not that it chooses what map, but that the map has some property or another that screws it up? Hell, It could be because of a skybox, for crying out loud.