Actually after closer inspection,flickering started in 1.07

The first undelphix works fine, no flickering. I have also noted that with 1.07c, the sprites are altered too.

For example, 1 black 25*25 cube with a yellow line running through the middle. In earlier versions, the line is correct at 5 pixels wide. In 1.07c, the line is about 3 pixels wide, smoothed out and looks completely wrong.

Didn't go into it much really, the flickering is the main issue. I have gone back to early version of undelphix