Pixel lines are only part of the problem
Not been here for a while, but I see things are progressing ever further downhill...
Anyway - just been laying up some diagrams - exported from Powerpoint in RGB - and I made the figure using predominantly pure RGB colours. Look pretty good.
Open in Photoshop - still OK.
Convert to CMYK(needed for publication) - crap. The pure yellow from the RGB tones down slightly in CMYK, but the real problem is the interference lines that appear. These are static, and about 4-5pixels apart, so I think they coincide with every other bright row of the LCD pixels.
This is my first real-world demonstration to myself of how the lines affect image presentation. (Yes I see the pixel lines in photos and stuff - but I'm getting used to them, and I tend to look at photos from a distance. This is altogether different).
My image should contain solid colours of yellow (with some shadowing), but now it looks like I have wide textured bars across the yellow shapes. Pretty disappointing really.
Set your ColorSync profile to: sRGB IEC61966-2.1, and open the attached file. If you are on one of the afflicted powerbooks, you'll see wide horizontal shading that doesn't move at all as you drag the window around the screen.
The problem is much worse on the left of the screen than the right, too.
Just checked it on my iMac G4. No problems at all.