If you are running the gnome-pager applet and have a
application that is to large for your screen or just
positioned so its in another pager you cannot resize it.
Take this for example; my X is currently setup for 640x480 (
crappy monitor and video card ) if I start up gnomecal or
gnomecard they both take up the whole screen plus a bit of
the bottom row in the pager. If I click the bottom row on
the pager, and attempt to resize the apps, as soon as you
start to drag up you get switched to the top row immediately
without resizing the application. With this happening, you
cannot resize applications which are to big for your screen
by default.