Good news: Apple has released a Snow Leopard update that fixes a number of problems customers have reported. The Photoshop team has been helping Apple test these fixes and can confirm the following improvements:

Affecting multiple versions of Photoshop:

• 50654: When opening and saving, applications–including Adobe applications–may sporadically crash
• 51230: Images don’t open when dragged onto the Adobe program icon in the Dock

• 51220: Crash or program error occurs when using Menlo font in Photoshop and Premiere CS3 and CS4

CS4-specific:

• 51764: Only one image opens when many are dragged onto Photoshop’s icon
• 51278: Cursors don’t display correctly in Photoshop CS4
• 51339: Editing in Photoshop CS4 fails from 64-bit Lightroom in Mac OS X 10.6
• Cannot drag from Safari onto Photoshop icon (and other application icons) in Dock to open file

I have  been suffering from all the mentioned above issues since i updated. I am glad the finally fixed it so far i have not had any more problems