Is there a way to find out why some files aren't being included in the build?
Edit - Removing these files from the app's requires does fix the problem. I will try and put them back and see what happens.
and to try to resolve this, I went through each file and looked at all the requires, and added them in order to the app. Then, following the advice of http://www.sencha.com/forum/showthread.php?248757, edited my sencha.cfg to point to the touch/src/ux directory. I thought that this might work, until I tried it on a fresh browser with appcache cleared. no luck, still getting this datepicker nonsense (so I've removed it and will not use a datepicker, but .. still don't know why this thing is not cooperating.)