Hi Ron,
Hi Lou, Well since you are really trying to add backward compatibility why not make it explicit. snip...
I did a little research, it seems DisplayScreen fullScreenOn doesn't show up until 5.1, so I went with this:
versionArray := Smalltalk version splitInteger. version5_1Plus := (versionArray first = 'Squeak') and: [versionArray second >= 5.1].
Any 5.1 image or newer will use DisplayScreen fullScreenOn, older gets Project current fullScreenOn.
I haven't uploaded it yet as I want to see if anything else comes up.
Lou