It is a registered type name, yes.
> Makes it rather painful
> to support multiple versions, I'd think.
Apparently the company felt strongly they didn't want to do the obvious thing,
which is:
application/wordperfect; version=5.1
for some reason. I say the company's wishes should be ignored. :-)
> is illegal syntax, which doesn't infuse me with confidence that this is
> being addressed consistently. On another note: I know next to nothing about
> Wordperfect, but does it allow any kind of key binding? It's rather
> sketchy to download files from untrusted sources into applications not
> built with the concept of trust in mind.
WordPerfect allows macros (i.e. programs) to be included in documents, and
therefore has potential security risks. A proper security review was never
done when the type was registered; the Gopher folks said it could be done
later on. Needless to say, it never was.