I'm completely puzzled: I have a whole series of images I need to
optimize/reduce, and all three dimensions (w, h, resolution) appear to be
locked, with the constrain proportion box grayed out. I'm using FW 8 on a Mac,
and this appears to be a fairly recent problem. What ridiculously simple
solution am I missing here? And why might it be happening with images I've
received from others? I've optimized many images in the past without incident.

Thanks for any !

You didn't say which version you are using, but I am on CS3 and didn't
appreciate the other day when resizing a square with dimensions something
like 196x196, typing 200 in the top box resulted in 201 on the bottom and
vice versa. I had to uncheck constrain proportions to get what I wanted.
This would seem like a programmatic no-brainer!?