Async replacement causing JQuery problems

Hi,

I’ve discovered that using a hidden class secretly enables asynchronous mode. I think that should be flagged up explicitly in the settings page.

Also, I’ve discovered that the non-async mode doesn’t work when the link contains an image:
http://www.allsoulseastbourne.com/whats-on/christmas/
(the large image is linked to a PDF, and the page doesn’t render right with the mime icon, perhaps because the CSS sets the height to 16px?)

But my main problem is that the async JS is causing a clash with another dynamic element on my page here:
http://www.allsoulseastbourne.com/resources/sermons/
The [show search options] button will not work properly when async replacement is turned on. I’m not good enough with JS or Jquery to be able to analyse the problem. Can you help please?

http://wordpress.org/extend/plugins/mimetypes-link-icons/