2D animation floating around on Android

I have a problem with 2d animations - I play an animation made of 10 sprites at one place and it looks fine on player using galaxy s2 resolution (800x480), but on actual device it looks like it is floating left and right by around one pixel.

Animation is made of 10 sprites sized 104x48 pixels, imported as Multiple sprites (Filter Point, Truecolor, 100 Pixels to units, pivot center). It uses Mecanim.

I made sure position is round pixels (0.xx)

Any ideas what can cause it?