User blog comment:Rappy 4187/Technical Update: September 16, 2014/@comment-4129195-20140916185747/@comment-126761-20140916204850

This kind of caching issue should not still be the case (at least not beyond a few hours if the servers are being slow) - our image serving systems have changed pretty radically over the past few years. Please do send us in a Special:Contact report telling us more about the problem, so we can investigate it further.