I've been running Fusion 7 (currently 7.0.1) on Mavericks for quite a while, and had "Use all displays in full screen" on in both my Windows 7 and Windows 8.1 VMs (I just use one at a time) and everything was fine. I upgraded to Yosemite on my late-2013 27" iMac and now it no longer seems to detect that there is a second monitor. If I turn the Use All displays in full screen option on, it adds a second full screen Mission Control desktop to my main display. The original desktop contains the new extended Windows desktop, and the new desktop contains both the original and extended desktops side-by-side with black bars top and bottom. See attached screenshot of my Mission Control main display desktop view. I've rebooted both the guest and host OS' several times.
The second monitor is connected via a mini-displayport to HDMI adapter plugged directly into one of the Thunderbolt ports. All multi-monitor functions on the Mac side work as expected
How do I get this sorted out?