When I used to start the game *and leave the window unfocused* while it loaded before this snapshot, on my Windows PC the icon would glow orange (a notification) when the game finished loading. This no longer happens, and now I have to regularly check back to see if it's loaded.
Here's a quick screenshot I took (powered by Lightshot):
> http://prntscr.com/4d985a
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Cannot reproduce:
http://i.imgur.com/IhfgdeC.png
I think it's not related to Minecraft but to your computer.
Cannot confirm on Windows 7