I love the color themes (thanks!), but one seriously nagging issue is that the code that is #ifdef'd out, is impossible to read (and annoyingly bright). If I highlight those lines, I can read it, but I'd really really rather not see it at all. Seems to be a similar issue as the one for tool-tips, but I am hoping that there is a setting somewhere to turn off the syntax highlighting for inactive code. I have looked and not found it, but that doesn't necessarily mean it doesn't exist. I am an optimist (in this regard anyway).
You can disable #ifdef highlighting entirely by going to:
Window -> Preferences -> C/C++ -> Editor and unchecking the box "Highlight inactive code".
Also, you can change the #ifdef highlighting color by going to that same screen and changing the "Inactive code highlight" color (under "Appearance color options" heading) to a color that works better for you.