I first saw this problem in my survival world and then went on to test it in a creative world. Silk touch seems to not work on glass panes. Also, If you silk touch a redstone lamp while it is powered (lit), it shows up in your inventory as an entirely different item. A lit redstone lamp, and it wont stack with unlit redstone lamps in your inventory. Just wondering if this was a known bug or if anyone else was experiencing this?
Silk Touch not working on glass panes?