Version:           3.9.92 (using KDevPlatform 0.9.92) (using 4.2.85 (KDE 4.2.85 (KDE 4.3 Beta1)), compiled sources)
Compiler:          gcc
OS:                Linux (x86_64) release 2.6.27.21-0.1-default

Right now, the editor settings are global. That means if I set the editor to two spaces indentation, I have to change that every time I switch to a project to uses four spaces indentation, which is annoying.

So please make the editor settings per-project. Probably should base the editor settings of the project based on some global settings.
Another solution could be to make the style settings per project. Those style settings could then overwrite some of the editor settings, like amount of spaces used for indentation.