We're running into some issues where there is a noticeable difference in image rendering quality between our Tablet Nightlies and the stock Browser (and other browsers). Here are some examples: http://cl.ly/0z1C211H0M18042m0a1s and http://cl.ly/1s093f0V0f050r213d2D One suggestion was that it might be a result of page scaling. Let's do a test with an unscaled page, to see if that improves our image quality. If not, we should keep investigating this.

The banding or color shifts you see are are almost definitely due to limited color depth with 16 bit (rgb565) surfaces or rendering. The only way to get rid of these artifacts would be to up the color depth to 24 bit. We would need to introduce a special path or preference for tablets to differenciate between the GFX_OPTIMIZE_MOBILE define we have in place now.

FWIW, bug 683243 won't help with any of the cases here. Bug 764041 makes more sense.

Closing all opened bug in a graveyard component