http://jira.secondlife.com/browse/MISC-1728 notes an unusual occurrence in SL:
Ever since the release of 1.21 many prims in SL now are round and orange with faces on them. They were not there before. Many places I know well now have some prims like this. Seems like maybe one in ten prims in SL are now suffering from this bug.
I am furious that Linden Labs can release a viewer with such an obvious rendering bug.
.... I LOLed. xD