Thread:Project:Support desk/MediaWiki v1.19.1 installation: Compilation failed: support for \P, \p, and \X has not been compiled

Trying to install MediaWiki v1.19.1 on PHP 5.3.3 spits out these errors in many places:


 * Warning: preg_split [function.preg-split]: Compilation failed: support for \P, \p, and \X has not been compiled at offset 192 in /path/to/wiki/includes/parser/Parser.php on line 1483
 * Warning: array_shift expects parameter 1 to be array, boolean given in /path/to/wiki/includes/parser/Parser.php on line 1484
 * Warning: array_shift expects parameter 1 to be array, boolean given in /path/to/wiki/includes/parser/Parser.php on line 1484

Is there a workaround? Recompiling PHP is not an option.