Is Stewart Butterfield leaving Flickr? According to valleywag.com, that might be the case. But Butterfield isn't really making his plans clear.The blog is reporting that Butterfield is leaving Yahoo, which bought Flickr in 2005, to spend more time with his family. The blog had no news on whether Butterfield's wife and Flickr co-founder, Catarina Fake (seen here with Butterfield), would be remaining at Yahoo to direct Flickr. Then Butterfield himself posted a comment saying he is merely taking an extended paternity leave from Yahoo. They're always innovating over at that company, as we told you recently.