Personally, I don’t like non-standard plurals and take the opportunity of a new word not to carry the mistake through. I prefer “mouses” as well, for the plural of a computer mouse.
mouse => mice
corpus => corpora
thesaurus => thesauri
Emacs => Emacsen
Unix => Unices
mouse => mice
corpus => corpora
thesaurus => thesauri
Emacs => Emacsen
Unix => Unices