Comment: Gibberish from setup.php

Maybe you are suffering from the BOM syndroma. This issue is coming from the Unicode/UTF-8 encoding of international characters. The BOM is a sequence of chars to be put at the beginning of files to signal they support the Unicode standard. However, this should not be inserted into PHP scripts, because it kills the standard XHTML output as you have reported. The question is: why has the BOM appeared in some scripts, since the YACS archive does not feature it at all? Maybe you have edited some file with a UTF-8 compatible tool that has added the BOM header to global.php? Normally this issue would not appear with files from the official archive...