Under "Technical guidelines", Google now tells us:
This replaced the following bullet:
I noticed something like this, recently, when looking at one of my websites in Webmaster Tools. When I attempted to "Fetch (my homepage, in this case) as Google" my logo was not appearing. Huh? Oh yeah, I had added my image directory to my robots.txt file so Google wasn't able to see my logo.
Perhaps I should change this.
What do you think? Tell me about it in the comments, below.