Unhappy [Q] Dots and Saturated Colours

Yesterday I upgraded Canvas HD to 4.2.1 using SP Tools. It's working perfectly...just having following issues with display.
  • Edges of some apps/elements have noise like dots
  • High colour saturation

I restored 4.1.2 and everything was solved. However when I upgraded again, all problems appears again. Saturated colours look very ugly.

Any solution?