Vista - Strange multi_monitor behavior

Using VPC2007 SP1 on XP SP3 host. Various guests, all with Additions installed.

I've only recently started using VPC2007, but I do not remember this happening
in VPC2004.

My main screen (the one with the host taskbar) is 1680x1050, and I always run my
VM's full-screen at 1600x1024 resolution, which almost fills the whole screen.
If I click on the black border outside the VM desktop, nothing happens. This is
fine -- to go back to the host I can do Right-alt/Enter.

With the guest full screen on the main screen, I now click somewhere on my
second screen. The host taskbar appears on the main screen, providing a simple
way to access other applications on the host without using the keyboard (I'm a
mouse person...). When activated from the host taskbar, other non-maximized host
windows on the main screen appear on top of the guest, which is still in its
full-screen mode location, with no VPC frame around its desktop.

But here is the strange thing. If I now click on the guest, the host taskbar and
other host windows on tha main screen disappear, but the VPC frame appears
behind the guest, maximized on the entire 1680x1050 host screen, so that it is
visible in the border around the guest desktop (which is still in its
full-screen location). Though present, this VPC frame is not live; for example I
can click its close box and nothing happens. The only way to get the guest back
to normal is to hit Right-alt/Enter twice.

Does anybody else see this? For me, this effect spoils what would otherwise be a
nice mouse-only way to switch between the host and a full-screen guest. I'm
pretty sure this did not happen in VPC2004.

--
David Wilkinson
Visual C++ MVP