I would say that no, no one knows anything on it. I’ve googled on the issue, and also came up with nothing. I’ve seen similar problems, but it’s always due to the use of comment text and IE – and the result of that bug isn’t the same output as what you’re seeing.
This is definitely NOT a WordPress issue – this output is being generated before even the WordPress code is – I would say it’s something odd going on with the installation of something on your server, or something that’s set up on your server. (Which is why I suggested you check your logs – you may see something that refers to it.) My initial guess would be that it’s an Apache thing – I’ve seen something similar when Apache generates what’s called “ants”. You’ll see a number generated, and that number is associated with an “ant” – you can find lists of “ants” and what they represent all over the place. However, I’ve never seen an “ant” appear on a website – only in logfiles.
That’s my best guess though – this is most certainly not a WordPress thing, though. The fact that your pages take such a long time to load up also points to a server issue – I’ve never seen a site with so many issues in just loading up a page (I tried it again today, and it took another 3 minutes for the site to even *try* to come up.)