Hi all, I would be very happy if those ALT shortcuts would disappear and be replaced by CTRL-shift in Linux and Command-shift in Mac OS X. I tried them in some applications on OS X and no obvious conflict appeared. Usually, Command-shift-T makes the text palette appear and Command-shift-C shows the color palette. It's all right then ! And for CTRL/Command shortcuts, I'd say that they will create too much conflicts with other applications' shortcuts.
aalex