First of all, *thank you* for the reply links; they're wildly useful.
See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762194#413 for an
example of this issue. Notice that the mail has a section marker symbol
(§) in it. The mailto link uses the following URL encoding:
%C3%82%C2%A7
That encoding translates to §. This looks like the result of taking
the section symbol (U+00A7), encoding it as two bytes of UTF-8 (0xC2
0xA7), then interpreting each of those two bytes as a character and
encoding those as UTF-8 (0xC3 0x82 0xC2 0xA7).
- Josh Triplett