Just downloaded 3.x including a new 3.x VM for Windows.

Start the 3_0.image fresh from a download.  Global flaps are all nicely
positioned in the center of all 4 sides of the window.  Then I minimize
the Windows window and then restore it and all of the flaps go and hide
in the corners.

I went back and this looks like it happens all the way back to 2.8, at
least for me.
In the archive there are references to this back around 12/15/00 by
Chris Norton who discovered a similiar behavior.  Looks like if there
was a fix it was short lived or never existed.

Windows NT 4.0 SP5, PIII 800MHz

Steve Gilbert