Ehm... I'm working in Midori, and it's great.
Mime... I recall if I take e-mail attachments from my window's friends, it always be as 'application/octet-stream'. And, maybe if you work in SliTaz but want to attach files from ntfs partition, they all treated as octet stream? Dunno...
Now I write from my Symbian mobile under Opera Mobile, and I try to attach some file here.
Well, you can post all your files directly to me. My e-mail address you can find in my profile, just click 'Coder-hobbyist' link.