Spawn eggs have visual glitch (may be old)

ok, I swear I've heard of this before but I haven't tested it until now. The spawn eggs have a weird graphical glitch when they are dropped in a set of 2 or more. It looks like the spots are revolving around the base eggs... like they are not a part of the egg's sprite. so I made a video looking at the eggs. Single eggs are fine but the groups are glitchy...
video------> http://www.youtube.com/watch?v=kVHkw3W_zTg&feature=plcp