New Update broke dual monitor

I have two monitors. This was working fine. Today a parallels update was installed. Now using Windows 7 in Coherence on the secondary monitor Guest OS windows appear torn (as if the scan rate was off on an old TV). This does not happen on the primary monitor.

The primary monitor is the HDMI port of my Mac Mini (new mid-2010 version) and the secondary monitor is the MiniDisplayPort. If I unplug the HDMI the windows on the DisplayPort (now the primary) look fine. When I plug the HDMI back in, the problem returns.

Help!

Edit: It’s got something to do with the fact that my secondary monitor is rotated to portrait. When I put it to standard or 180 rotation it works normally. When I put it to 90 or 270 it looks all right for a few seconds, then it loses Coherence Mode, then when I put it back into Coherence the problem comes back. Again, this configuration worked fine in the last version. Also, my primary monitor is in portrait (90).