I just noticed the second time that some of the icons are not unique. Take this question, for instance: Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?
I noticed this question in the sidebar and wondered, "How is this question posted in spanish.se? It doesn't make any sense." I then went to that site and discovered it to be Earth Science. Same problem is there with Magento SE and Martial Arts SE.
Is there any plans to replace them with new icons. A color change, even?