Ya your posts was one of the reasons I dug into that bug, I was fortunate to be able to reproduce the problem on my own system, most of the chameleon developers weren't able to - it seems to be a rather selective issue - it only effects a few graphics cards (framebuffers).
As of build 1407 it's *mostly* fixed, there is still a bit of a bug in rendering but at least the system will boot. In future versions of myHack I'll just be including some VESA definition in the generic Extra to avoid confusion if they are on a system that experances the issue.