Xcode's syntax highlighting is one of the more annoying misfeatures. It quite frequently seems to get lost and mistakenly decide whole sections of code is a comment, or other similar mistakes that do not have an obvious cause. Reloading Xcode, or even making slight changes to the code layout itself doesn't seem to correct it either. It seems to do this more often with straight C than Objective-C code, which I suppose isn't all that surprising, given the number of people using it for the latter.

I hate to say it, but that's one thing that Microsoft's IDE tools seem to be able to get right. Of course, even vim from the command line gets it right too.