Memory leak when a html containing form is reloaded

Version: 3.0.0 (Beta 2) and all previous versions.

There is a memory leak if html containing 'form' element is reloaded.

If you run the attached sample in IE 7, you can see in task manager the memory is consistently increasing.

If you replace the line
lyr.setHTML(form_causes_leak);
with
lyr.setHTML(this_doesnt_leak);

and rerun the sample, there is no memory leak.