Files with multi-byte chars detected as fields from FireFox 5

[OrangeDog]

I can't tell whether this is a bug with FireFox, with all other browsers, or with formidable.
Using formidable 1.0.2, node 0.4.8.

A file with a 3-byte character (tested with U+200F and U+2010) in its name, when uploaded via FireFox 5, is parsed as a field rather than a file. In my particular case, this results in "max field size exceeded" errors. Everything works correctly when using latest Chrome or IE8.

[OrangeDog]

On further inspection, FireFox gives this header
Content-Disposition: form-data; name="foo"; filename="bar‏.mp4"

While Chrome, for example, sends this
Content-Disposition: form-data; name="foo"; filename="bar?.mp4"

[OrangeDog]

While on the subject of incoming_form.js:283

Chrome will not escape a ; in a filename
FireFox will escape " as "

[felixge]

Yeah, looks like some stuff needs to be fixed here.