$ evince foo

Evince opens up, and immediately errors out (foo is not a actual file, of course). The error, however, is "Unable to open document" "Unknown MIME type".

This is bad from a usability standpoint for several reasons. For starters, who knows what a MIME type is in the first place - why is it being mentioned? For anyone who doesn't already know the problem, this sounds for all the world like the file is corrupt or 'bad'. Because if there is no file but we can still speak of not opening it, then we start getting into Zen territory: "What is the MIME type of one hand clapping?" "Does this dog have the read-write nature?" "What was your file size before you were born?" "This day 15 years from now - open that document!"

Basically, if there is no file there, it should say "Hey, bub, there's no file by that name." Not this.

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