I've suddenly started having a GUI bug in the Process Explorer window of PI. When I click on the Process Explorer tab, the Process Explorer palette comes out, as usual, but the right half of the palette is covered with the Documentation Browser. I can still click on Process icons, and the Process instances start up just like I want, but I can't see the names of the Processes very well. I've tried everything I can think of, but I can't get the partial Doc Browser to go away. I can't properly read the Documentation, either, since the Doc Browser `cover' is so narrow.
I'm running PI 1.7 on a 2009-era Mac Book Pro, OS X `Snow Leopard' (10.6.8). Several updates of the documentation have recently installed themselves, but this doesn't seem to have started after one of these updates. It just seems to have started by itself.