On my set, the artifacts mainly show in real material.
The only testpattern i use is basically a 100% black screen when adusting volrstp. If you use the brightness control of your player to quickly raise the brightness to the point it gets bright, and your volrstp is not correctly, you will see a reddish lag staying behind. You will also see that the buildup of the screen is 'slower' in some area's, basically the areas where the reddish tint is... you should be able to fix this by raising volrstp and 'testing' it with raising and lowering brightness.
The purple sparkles i only see in real material, not in any testpattern. I'm using a scene from House' last episode S08E08, basically the first minute. It's a scene in a dark court room where the camera switches between people, and when it does, purple sparkles will stay behind. Again, if the sparkles are gone, so is the reddish tint.
You will find that you have to raise volrstp quite a bit to get things perfect... mine was 27 before the pulse reset, and is now at 72.