I have to upvote this unfortunately. I visited the Github site this morning for the first time in a while, and encountered the new icons. The new book, notifications, and door icons were not immediately obvious to me and I had to hover over to see what they were. I guessed what the wrench represented, but due to the uncertainty caused by the other icons, I had to double check what it was for as well. I actually didn't even realize that the icon with a "+" on it was a book.