The problem was with .svn subdirectory.
I moved all files from directory then i start feeding it back
when the .svn dir has been moved away and back everything is ok.
Maybe add option to not scan .svn or directory with . at the begining of name.
That is really weird: Only files listed in packages are scanned, which does not include .svn (note: this might change in the future to scan all used include files (e.g. win32 API) - but even then .svn directory should not be scanned).
I am always feeling a bit nervous when encountering a bug like this. Any more ideas what can be significant here?