Please describe the problem:
evolution does handle "Content-Type" field as case sensitive while
according to http://www.w3.org/Protocols/rfc1341/4_Content-Type.html it
shouldn't be case sensitive.

Currently, when I receive faxes using hylafax, the e-mail attachment
have this header:

Content-Type: application/PDF; name="fax000000179.pdf"
Content-Description: FAX Document (PDF)
Content-Disposition: attachment; filename="fax000000179.pdf"
Content-Transfer-Encoding: base64

and evolution doesn't offer to display the attachment using xpdf, but it
just offer to save the file.

If I change "application/PDF" to "application/pdf" then evolution
display the correct menu.

Bye,
Giuseppe

Steps to reproduce:
1. Export email with PDF attachment to mbox
2. Hand-edit the mbox file so that Content-Type says "application/PDF" instead of "application/pdf"
3. Import mbox file
4. Right click imported email


Actual results:
There are no suggested application to open the file with

Expected results:
Evince is suggest as it does for the email with lowercase Content-Type

Does this happen every time?
Yes

Other information:
This bug was originally reported by Giuseppe Sacco at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=421672

I tried the same with a image/jpeg attachment, but didn't experience the problem then.