Just found a fresh bug with the new version of Logic.
Check the first screenshot link and you can see that there are listings for 16 and 25 multi-output modes, this should only be 1 listing for 3. If you select either one of these modes you get error message in the second screenshot. I unfortunately cannot rollback to 10.4 as this is a brand new setup and the installation updated my new Mac Pro and MacBook at the same time so I'm essentially blocked from using one of my primary tools in my primary DAW on either one of my computers. I'd advise Logic users to avoid installing the new update because of this.
Please note that the Stereo mode version of the Plug in does work however.
Marc Any chance we'll see a fix for this soon? This is a major functionality impairment.