Posted by: Brett
According to Android Central, a new, tweaked version of the Nexus 4 is shipping with small “nubs” at the bottom corners of the device allowing for the device to be ever so slightly raised when laid on a flat surface. The addition of these nubs are likely to help combat the scratches users have been getting on the glass back of the Nexus 4, even with light use. In addition, the camera housing has been slightly modified with less open area around the lens, although the purpose of this tweak is unknown.
Source: Android Central