In xcode4, (I have used v4.0.1 until now and downloaded v4.0.2 yesterday.) I made Localizable.string files and compiled my project. (As you know, my source code uses NSLocal
I had this problem. My fix? Add a newline at the top of the file. Bizarre but it got it working for me.
So instead of at the top of my file having this:
/* comment */
"LOCAL_APP_GRADE" = "Basic"
I had to do:
[newline]
/* comment */
"LOCAL_APP_GRADE" = "Basic"
(Can't get the formatting right - don't type 'newline', just hit return!)