Minor fix thursday

Note on flickr sizes from https://www.flickr.com/services/api/misc.urls.html


s	small square 75x75
q	large square 150x150
t	thumbnail, 100 on longest side
m	small, 240 on longest side
n	small, 320 on longest side
-	medium, 500 on longest side
z	medium 640, 640 on longest side
c	medium 800, 800 on longest side†
b	large, 1024 on longest side*
o	original image, either a jpg, gif or png, depending on source format
* Before May 25th 2010 large photos only exist for very large original images.

† Medium 800 photos only exist after March 1st 2012.