* "The Little Lulu Show" episode "[[http://www.youtube.com/watch?v=voaRNOn9bSI&feature=related Minibur]]" has one scene in which at 1:19 Wilbur is seen briefly naked when he jumps in the bushes after having his clothes ripped off by a bear.
** This doesn't really count as GettingCrapPastTheRadar; several episodes featured the male cast naked, often explicitly showing their butts much more clearly than that.