Neither with Text document nor with Spreadsheet, toolbar button for "Document as E-mail" is not working. There is no response after click on it.
FYI - default mail client is Thunderbird.
Working with Ubuntu 13.04 x64 and Version 18.104.22.168 (Build ID: 400m0(Build:2))
Could you please recheck that... Please change the status, if it doe not work for you....