On the transcript page, the audio doesn't play. I went to http://popupcantonese.com/lessons/elementary/the-art-of-comparison, clicked "Transcript", then tried clicking one of the play buttons next to each sentence.

Also, after highlighting and clicking a word, a popup window appear with details about the word, but I cannot dismiss the popup. Clicking the "x" to close the popup window does nothing.

I'm running Mac OS 10.6.8 and I get the problem on both Chrome 16 and Safari 5.