Sprite animations sometime don't work

Questions & Answers
1

The animations work in the editor, but sometimes when you build and run on a device one sprite just isn’t animating. Why?

2

This is apparently a problem with transitions on sprite animations. See this question for more information:

In short, until someone fixes this or gives some insight on why this happens, never put transitions in animation controllers which handle sprites because it seriously breaks them. You’ll have to handle your animation changes in code (not too hard if they are simple enough, but annoying nonetheless).

I opened this bug:

http://fogbugz.unity3d.com/default.asp?636132_hc9ckrfhum9l406r

but it seems to be unattended so far.

Hope that helps.