JavaScript Injection Bug

There's some sort of JavaScript injection bug going on that causes popups to http://m11.3322.org or something similar. I can't reliably reproduce it.

I can't seem to reproduce the bug outside of post/index, and even then it's only on certain pages (at random points), which leads me to suspect the cause is one of the posts. If anyone finds any contradictory evidence, please leave a comment.

What pages is it supposed to happen in, exactly?

I've seen it happen in http://miezaru.donmai.us/post after refreshing several times, and people have reported it while searching.

A status update. The JavaScript isn't being injected from Rails, and (initially, after running tcpdump) Apache doesn't seem to be the cause either. We've also discovered that this bug appears even when you hit a static page like 404.html.

Has this been seen on multiple client platforms? It sounds like some ad-injecting malware on the client's end.

I can't say I've come across anything weird either.

It's happened to multiple people, on both Firefox and IE7. I haven't seen it since this morning, however.