Hi there is a problem with extension registration because skins are not working with javascript seems the styles load but not javascript. it was since upgrading to wmf 7 I have had this problem so not code problem with skin. but I have tested it with metrolook and seems to not work but worked in wmf6 and vector which seems to work but broken in wmf 7
Please visit these two websites
http://en.random-wikisaur.tk
http://pt-br.random-wikisaur.tk
and problem may happen to other skins I haven't tested any others.