Quoting charset


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?