My reading of RFCs 2068 (section 3.7) and 3023 (section 8.1) suggests that mimetype parameters can be quoted so that:
text/html;charset="utf-8"
should be the same as
text/html;charset=utf-8
However, numerous browsers (including Firefox) seem to only recognize the latter and not the former.
Have I misread the RFCs or are the browsers wrong?