Very interesting question. The information displayed is, of course, the name of the file that provides backing store for your current world of objects. This is exactly analogous to Mozilla having a title bar like "Mozilla - The Squeak Home Page".
Still, it would probably be nice if it says "Squeak" as well as the filename. Also, I notice that it spells the filename out in full, if you have specified an absolute filename, and that seems like overkill. And finally, it may be worth leaving off the image filename if it is the default "squeak.image".
By the way, it is weird to use images with names like "Squeak2.8beta.image". Once you save it, the image is no longer a 2.8beta image, but is a custom image that you have created. I vastly prefer a title like "squeak.image" if you have no more specific name to use, and I'm happy that inisqueak on Unix encourages this convention. If I see a file whose name is Squeak2.8beta.image I would very much like that file to be an *image* for *Squeak* version *2.8beta*, and not a derivative of it.
Anyway, just thoughts. What do people think? The above 2-3 changes should be *extremely* easy to imoplement if someone wants to play around with VM hacking hint hint.... :)
Lex
PS -- no, you can't control the windowbar title from Squeak. Note that in many cases there is no window bar, e.g. if you are running directly on a framebuffer device.