Since today's patch I've encountered floating Wolvers and floating Giant Lichen Colonies on several occasions (they move outside the boundaries of the map). I've seen this happen in the past, but it appears to be happening more frequently since the patch.
I actually have a screenshot of the glitch happening.http://i1068.photobucket.com/albums/u449/zackkattack/2012-03-07_00001.jpg That link should take you to a photobucket accout with my screenshot I drew a red circle around the glitch