Within the XAMPP WIndows Package included php-version is a bug causing i.e. Mediawiki and a lot of other examples to throw out an error in the kind of
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM....
This is solved within PHP 5.3.2 or PHP 5.3.0.
So im waiting eagerly for the next release
PS: T_PAAMAYIM_NEKUDOTAYIM is also referred as T_DOUBLE_COLON