Object doesn't support this property or method ERROR


I am using theme: BuddyPress Community 1.3.3

(when I updated to the latest 1.3.7 – same issue).

I am using IE 8

I installed WP Minify – which is NECESSARY to speed up the site.

If you click on a comment in IE – you get the following error:

Message: Object doesn’t support this property or method

Line: 285009749

Char: 434

Code: 0

(line number changes depending on page – char 434 is the same)

Works fine with Firefox.

Any ideas?