You mean PHP?
Not really... PHP5 is finall... its just that its quite har to make it work good on Windows.. And most things work for PHP5 also... there might be some slighjt problems if a developer was stupid enough to use some functions that are not working in PHP5..
However it will take a while before installation of PHP is easy... it works really good for me with Apache... but i hated it with IIS.. think about it
