I’ve submitted a ticket on this issue and hope (need) to hear back soon and will keep you all posted. I even referenced this thread in my ticket so they should see it and may address it directly.
Glad I found this thread. I ran into the same issue when I went back to update some custom code. It asked for double quotes instead of quotes and it “broke” the form when I did that.
This is highly discouraging for those of us who use custom code in WP (which I am going to assume is a lot of people).
I am going to look on some other forums to see if anyone else has come across a fix.
I had this issue in Firefox, and I found this plugin that seems to work well: http://wordpress.org/extend/plugins/seo-facebook-comments/