Is This uGUI 4.6 beta 19 Bug?

When I modified prefab and clicked ‘apply’ button, all inactive object’s rect transform position was reset.

[33052-스크린샷+2014-09-29+오후+12.26.05.png|33052]

active object’s rect transform position is ok. but inactive object’s rect transform become (0f, 0f) :frowning:

what should i do? is this bug? or my falut?

Looks like a bug - we can’t fix our prefab by breaking connection - remove prefab - save scene. After creation of a new prefab and applying any changes Unity resets objects position. Any ideas on how to restore old prefabs? Or this is a major bug of applying changes in prefabs in new version?