I have CS3 on windows/PC.
I can open a file image.. even one's I have worked on before. It shows all the layers in the layer tool, even the histogram is active to the image.... but the canvas is BLANK!!! Even my tools on the canvas are not there. I have tried all images and tried trashing a couple of prefs.. still no image.
This is maddening, please shine some light on this.
In regard to the "tools problem" hit the TAB key, it'll toggle the tools on and off.
In regard to the blank canvas...please don't get me wrong.....but do you have the visibility turned on for the layers (the EYE icon) in the layers tab?