A note about latest XCode 4.3.1

Caution ! There is a bug at latest XCode 4.3.1 !
Don’t use the dragging files to add your source files.
Sometimes the XCode can’t recognize it as a source file, and you will get an error when you link your .o files.
You need to use the add file features instead.

This post is also on http://blog.molioapp.com/2012/04/note-about-latest-xcode-431.html

I’m not sure about this bug, but I agreed on using add file feature with properly specified what’s the enclosing folder of the file to be added.
Or even better, drag and drop files from Finder and add existing files into a project via that feature.