The 3D view mess-ups are fun to look at but are the most understandable and least unique to Apple. It's not hard to find messed up 3D in Google as well.
the last time i tried jedit (admittedly, years ago) i found the font rendering on mac os x to be ugly. since it's on your checklist, i assume it's improved since then?
The blog post confused me until I realized that the author meant "Don't Make Your Apps Offline-Stupid," rather than "Don't Make Your Apps Offline, Stupid."