I'm using Internet Explorer that came with the machine.

To me the thorn reproduces as a little h with the short leg abbreviated, but cutting-and-pasting gives me ®!= which I see as an R-in-a-circle followed by a not-equal-to sign [equal sign with a slash through it].

I can't see the ®!= in Opera that I could see in Mozilla...
and I observe that even this translates differently, as a r/circle, exclamation point, and then equal sign, when I preview the post !

Haven't fooled around much with keyboard combinations or different fonts to try for the esoteric characters...