css drop-shadow with morpheus

Hey, I'm using morpheus js and it's awesome. The only problem I've encountered so far is transitioning 'complex' css values, such as,

drop-shadow: 1px 1px 2px #fff;

This one wouldn't work no matter what I try, even setting this directly on the element's style as suggested with color transitions. Am I doing something wrong, or is it not yet supported? Any other ideas how to accomplish this with morpheus?