The WYSIWYG editor incorrectly escapes URLs in links:

For example, http://localhost/index.html?a=b&c=d becomes http://localhost/index.html?a=b&&&c=d

The obviously breaks the hyperlink.

A lot of our pages have links in them with GET parameters hence this means that our users cannot use the WYSIWYG editor to edit their pages, or if they do the page ends up broken.