[mgedmin]

This comment was clearly written by a non-Unicode expert ;)

U+2070 SUPERSCRIPT ZERO (⁰) is not the same character as U+00B0 DEGREE SIGN (°). They look rather distinct on my screen (I assume both characters come from Verdana, the font specified in the CSS of this site).

[jordanb]

I used Compose-^-0 to generate it. That used to make a degree sign. I guess it makes slightly more sense for it to be a superscript though. I wonder what the new compose sequence for degree is..