Patch to emit an error message in case the system locale is Unicode based. (LyX only supports 8-bit locales, i.e., if you want to be able to write German labels, index entries etc., your locale should be ¨de_DE¨ WITHOUT ¨.UTF-8¨.) (Entering umlauted/accented text into the text buffer is not affected by this.)
There should be still text added to the help files to assist people getting bitten by this. OK to commit? - Martin