Photoshop CS4 Extended Graphics Error

Question

Hello Everyone
I just recently upgraded to CS4 Master Collection in hopes of using it with my web design job I was hired for. Whenever I go into Photoshop CS4 Extended and I try to "Free Transform" something (an image, a shape, etc) and either the canvas goes black and doesn't respond for awhile, or it has these purple shapes that show up on a black background and they are pixelated. I do apologize if I am not describing this very well. You can see what I am talking about here on this link where I took a screenshot and posted it.
http://twitpic.com/2c2c2
The graphics hardware in my iMac are as follows:
NVIDIA GeForce 7600 GT:
Chipset Model: NVIDIA GeForce 7600 GT
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0391
Revision ID: 0x00a1
ROM Revision: 3022
Displays:
iMac:
Resolution: 1920 x 1200
Depth: 32-bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Built-In: Yes
I never have nor have I ever had this issue in Photoshop CS3. I look forward to everyones help and responses to this matter. Thanks in advance!
Josh Lindsey

Answer 1

this fixed the program error for me, at least for the time being. i do use the opengl drawing thing quite a bit though, i hope they fix this. i also hope its not my machine (1 year old macbook pro). i also speeded things up on my machine by having a separate scratch disk that i plug in (a firewire 800 drive) which i thought was the program error problem at first. some of the files that were not able to open i was able to initially open by duplicating them and then opening them. but not today--i haven't been able to open anything until i turned off the opengl drawing preference. good luck whoever you are! i know how frustrating this is--believe me, i almost slammed my computer on the ground today when it wouldn't open my files!
note that overall the opengl feature, i feel, is pretty rad though--i love being able to draw and rotate the entire canvas to match the orientation of my drawing capabilities!