module class suffix has no effect

Having an issue with Corporate 2 in which on a clean installation of Joomla, no third party components installed yet or anything the module classes of "DARK" "COLOR" etc don't change the appearance of the module

be sure to add a space before the suffix

I added the space and still nothing shows..

prestinary,

the space works as long as you enter the class suffix in lowercase letters. If you are like me you were using uppercase as the suffixes are listed on the demo site.