Whenever I set the color class on a TIFF file, I can only set it once, then after the first time it will not change again no matter what. I have tried all the various methods, keyboard shortcut, via Image>Set Color Class of photos etc. Also tried one at a time and multiple, but no go either way. Works fine for JPEG and PSD files I've tried, just not TIFF.
Mac OS 10.5.6
MacBook Pro 4,1
2GB RAM
PM 4.6