If I build the latest version of your repository (or take beta2/3 from downloads) and put them into this page: http://jsfiddle.net/samdelagarza/ntMdB/167/ instead of base version of knockout, then I get error: "Uncaught TypeError: Cannot read property 'needs' of null". You can see that here: http://jsfiddle.net/ntMdB/186/, it includes the version, I've built today.
If I build the latest version of your repository (or take beta2/3 from downloads) and put them into this page: http://jsfiddle.net/samdelagarza/ntMdB/167/ instead of base version of knockout, then I get error: "Uncaught TypeError: Cannot read property 'needs' of null". You can see that here: http://jsfiddle.net/ntMdB/186/, it includes the version, I've built today.