[Toneshed]

Yes.

It is most obvious when you duplicate an aux, using the same multi out source as an input, and then adding an insert to just one of the aux tracks. The result will be the typical phase shifted sound, as demonstrated in the video.

I am not sure if this happens also when the source is just a regular audio track, instead of an instrument's multi out.

I am gonne install 11.03 on my home Mavericks machine to see if it's solved.

Will report back here...