Files that have been changed in 1.3.1 update can be listed here:

When a call is coming in, the lock screen is now in two images(sysmgr):
screen-lock-wallpaper-mask-bottom.png 320x270
screen-lock-wallpaper-mask-top.png 320x102

And these are also found in the phone app.

disconnect-button-tall.png 320x411
disconnect-tall-firstuse.png 320x411
glass-full-picture-firstuse.png 320x452
glass-panel-active-picture.png 320x400
multicall-disconnect-button-tall.png 160x411
multicall-resume-button-tall.png 160x411
address-contact.png (32x26)

There are more, please add.