User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release) Build ID: 20140716183446 Steps to reproduce: Searched an IMAP account for the word "Buñuel" (which undoubtedly is present), both with "Quick filter" as well as with Ctrl+Shift+F. Other searches worked well. I presume this didn't because of the letter "ñ". Actual results: Returned "No results" with Quick Filter and "No matches found" with Ctrl+Shift+F. Expected results: Messages with the word should have been listed.