Our customer in Taiwan (using Taiwanese IE on Taiwanese Windows) got a javascript error when he accesses one of our pages.

On looking the source, I found that around 20 lines of javascript were missing from the HTML source getting rendered on his browser! The HTML above and below the missing lines was fine! There was nothing special about the missing javascript, and we have not had this problem with any other customer.

Has anyone had this kind of issue before? Could this be because of the IE version/language?