Keep us informed of what you find in your config that could cause the
behavior you see.

Let's be clear, the steps I posted are a workaround for the specific case,
not a general solution.  A perfect solution will be very hard to come by
because the website is using javascript (the YUI library, it appears) to
create GUI-like features through event-listeners.  What events it is
responding to is hard to say without a deep inspection of their
javascript, but if we knew, there might be steps we could take to
intercept and block those events when hinting was active, in some cases.
The entire topic is one of exceeding complexity.