Didn't see it suggested or asked: why is the feature image not in a 3:2 ratio that is pretty much standard for images? It's literally a handful of pixels off on the y-axis and so you're forced into a crop that may spoil the original composition. This doesn't seem ideal.
Now that we've been using this ratio for a number of months, I think it is working well - some of the photos that have been image of the week have been awesome. As such, I don't think it's too much of a problem - sure, some pictures might not work, but some don't work in 3:2 either.