You may have noticed that

I made some minor changes to the Spring template. One was a redesign of the banner graphic, which I felt was too busy. I opted for something more stylized, and in my mind at least, much more attractive. The second thing i did was to lighten the top and bottom blocks of color on the sidebar. To update your template, you can either re-download the source, or if you've made customizations and don't want to mess with them, do the following:

In the style descriptions for the .sidebar-top and .sidebar-bottom classes, change the background image from leaf_green_bg.png to lt_leaf_green_bg.png. It's that simple.