I have two wide monitors.  The "main" monitor is landscape, and the
"secondary" monitor (located to the right) is portrait.  The workspace
preview applet, that I have in a panel, doesn't show the whole
workspaces.  Attached is a screenshot displaying the problems.  I placed
four windows at the four corners of the main monitor, one in the upper
half of the secondary monitor and one in the lower half.  You'll notice
that only a sliver of the lower windows of the main monitor are visible
in the applet, and that the window in the lower half of the secondary
monitor is completely hidden.

  Thanks,

Roland.