Hi,
currently I'm testing 3M with
http://mitk.org/MITK-3M-1.0.0_r20262.exe 18-Nov-2009 10:10 32M
When I switch to measurement and start some measurement on a image, the standard view automatically goes into the 1-window 'transversal' layout.
If I want to switch back to a 4-window-layout, pressing the middle button of your buttons in the upper right corner has no effect then.