Has anyone else seen this elsewhere? It's new to me and I was surprised by how obnoxious it was given that the web isn't exactly a stranger to obnoxious flashing content.
Interesting. I asked a few coworkers if it was just me and they confirmed it. The actual favicon doesn't blink for you? http://www.litfuel.net/favicon.ico
It reports itself as a 6 frame gif for me. Maybe your browser is just more sane than mine (Firefox 3.x) and refuses to honor animated favicons?
I figured I was getting rightly downvoted because I wasn't saying anything about NLTK.
In my local version of firefox, the entire icon vanishes for about 5 seconds, every 5 seconds. Causing a notable visual disturbance. In Chrome on another system the eyes blink every 5 seconds or so. So yeah, my browser is being broken.
But when I asked people if it blinked ... they, of course, said yes.
EDIT: Also, as noted in an edit above, when viewed in Chrome it didn't animate unless the image was accessed directly. So for you it may blink, not blink, or really blink, depending on your browser and configuration...