Excerpts from Philippe LeCavalier's message of 2011-02-16 07:07:19 -0700:
> Here's mine. I just started building it but it's something...BTW Did you look into the mime-decode.rb hook?
> 
> cat ../../.mailcap
> application/zip; squeeze '%s'
> application/pdf; /usr/bin/xpdf '%s'
> application/msexcel; gnumeric '%s'
> application/html; firefox '%s'
> application/vnd.openxmlformats-officedocument.wordprocessingml.document; abiword '%s'
> 
> Not certain the last one is 'proper' but it works.

I tried adding this contents to my file, but I'm still getting the error when selecting an html email attachment:

Couldn't execute view command, viewing as text.

In response to another suggestion, I have not tried the mime hook. I haven't quite been able to make sense of it yet.

Christer