I recently switched the skin to "slate" from the long-press personalize menu on my Thunderbolt. Everything from the loading web browser, to the color outline of when you tap on an icon has changed from green to ICS blue. I'm not sure if this is just the "slate" theme (I never changed from the default skin on this phone before) but there was some sort of an update a few months ago and I wonder if sense UI got a slight update that I'm just noticing now. Either way, its pretty cool to find subtle new things on an end-of-life phone model. Anyone else notice something like this on the Thunderbolt?