Hey Chris,
> I'm the one that wrought the "Reuse Windows", and "traceMessages"
> preferences.  They are part of a triad of preferences (the third is
> "alternativeBrowseIt") that, when set, support a totally non-modal
> approach to browsing and development.

just forgot that I have to set the two other preferences too, I use 
images for a long time. Thanks for the reminder. And for implementing it 
in the first place :-))
> traceMessages is along the same lines, I can hardly even work in
> Smalltalk without this.

At least I find it much more cumbersome without.

Cheers,

Herbert