Using the "Add to Address Book" context menu function on an email address with a name seems to convert the name to lower case

Reproducible: Always

Steps to Reproduce:
1. Right click on an email address in the message view pane (e.g. the "From:" value) and select "Add to Address Book" 
2. Select "Default address book" to add it to and click OK,
3. Switch to the "Contacts" view in Kontact and view the newly created contact
Actual Results:  
The newly created contact's name has been converted to all lower case, e.g. 
"Joe Bloggs" <joe.bloggs@example.com> becomes "joe bloggs" in the contact's name field.

Expected Results:  
Name capitalisation should be preserved

The default address book I am adding to is an Akonadi VCF file resource as is the default.