Cookie Jar/WGBH (2006/2009)
From a newer U.S. (but not the newest) print of "Arthur" season 10 episode 10.
This episode aired in May 2006 (despite the 2005 copyright date), meaning this is a Cookie Jar era episode with a Cookie Jar logo at the end of said episode. And yet PBS plastered the older Cookie Jar logo with the newer Cookie Jar logo... Why?