Hmmm... I'm not at my computer right now, but try opening the WWWObject script and changing the type of storeMovieTexture from FsmObject to FsmTexture. That should work, but I'll take a look at it tomorrow...
Since Object variables are fairly new, a lot of the older actions don't use them. Should probably have an action to save an object variable value in another variable type, so you can convert when required...