I have a bizarre problem: Somewhere in my HTML/PHP code there's a hidden, invisible character that I can't seem to get rid of. By copying it from Firebug and converting it I identified it as 
or 'Zero width no-break space'. It shows up as non-empty text node in my website and is causing a serious layout problem.
The problem is, I can't get rid of it. I can't see it in my files even when turning Invisibles on (duh). I can't seem to find it, no search tool seems to pick up on it. I rewrote my code around where it could be, but it seems to be somewhere deeper in one of the framework files.
How can I find characters by charcode across files or something like that? I'm open to different tools, but they have to work on Mac OS X.