When pretty URLs are enabled I'm seeing the following errors in my Apache logs:
2a01:4f8:140:6ffe:4e2e:1d94:0:1 - - [12/Jun/2011:21:15:45 +0200] "GET /blog/wp-content/plugins/wp-minify/min/?f=wp-includes/js/l10n.js,wp-includes/js/jquery/jquery.js,wp-includes/js/comment-reply.js&b=blog HTTP/1.1" 400 243 "-" "-"
2a01:4f8:140:6ffe:4e2e:1d94:0:1 - - [12/Jun/2011:21:15:45 +0200] "GET /blog/wp-content/plugins/wp-minify/min/?f=wp-content/themes/platform/style.css,wp-content/plugins/wp-syntax/wp-syntax.css,wp-content/themes/platform/css/dynamic.css&b=blog HTTP/1.1" 400 243 "-" "-"
The root cause for this seems to be in wp-minify.php line 471:
`// append base directory if needed
$base = $this->get_base();
if ($base != '') {
$base_string = '&b='.$base;
} else {
$base_string = '';
}`
XML entities should only be used when embedding the URL in HTML.
