My photoshop is acting wierdly!

What I’m running:

15" powerbook, os x 10.4.2
photoshop CS

My beef:

  1. Usually you can drag and drop an image file on top of the photoshop icon in the dock and photoshop will open up, and open the image file for you. All that happens is photoshop opens and sits there, no image file.

  2. Double clicking a photoshop file (psd, jpgs etc) is supposed to open photoshop and open the file for you (Like above). Doesnt happen, photoshop opens, and again, just sits there. I hate having to manually open the file via the Open panel.

Any ideas???