Having read this and this, I've decided to downgrade Quarz.framework and QuartzCore.framework to their 10.6.2's versions. So I copied over the both files from a 10.6.2 virtual machine I had lying around to my 10.6.6 installation and...
Success! Now I've got transparent menu bar AND a regular black Apple logo.
- No logo color corruption on the menu bar
- App Store icons look fine now
- Someone said there were performance issues with 10.6.2. I don't see any difference in the performance using this method.
- Photoshop with OpenGL mode higher than basic results to green color all over the picture, so it looks like OpenGL corruption is still present
I can upload both folders if you need them.