As for 125 remaining issues: may be somebody with keen eye will just look at the sources and noticed wrong places right away. There were several places in legacy code, which I did not touch because they were in functions used by any game. I thought that some part of code is for reason, but actually it was a crutch to avoid some particular problem.
I asked before about detailed comments in the source code, but I would like to reiterate how useful it would be to have:
1) Questionable legacy code noted and explained (purpose and problems)
2) Comments on your changes (which part of code affects which games and which components, what regressions to look for when modifying)
You know an incredible amount of what to look for and how GFX issues are related between games. Some of that is learned in the issue tracker, but any more of this knowledge that can be "spoon-fed" to us will make it a lot easier to pick up.