Comment 2 for bug 1196220

with the following patch "simple-scan" -> "Email" works correctly again:

the first change makes sure that only the first occurrence of Exec in thunderbird's desktop file is considered: | head -n 1.
the second change is a fix for what is clearly a bug (having $browser instead of the correct variable $desktop).

diff -u org/xdg-email fixed/xdg-email
--- org/xdg-email 2014-07-16 11:43:48.000000000 +0200
+++ fixed/xdg-email 2014-12-30 17:44:27.990930489 +0100
@@ -321,7 +321,7 @@
         file="$dir/applications/$desktop"
         [ -r "$file" ] || continue
         # Remove any arguments (%F, %f, %U, %u, etc.).
- command="`grep -E "^Exec(\[[^]=]*])?=" "$file" | cut -d= -f 2- | sed -e 's/ .*$//'`"
+ command="`grep -E "^Exec(\[[^]=]*])?=" "$file" | cut -d= -f 2- | sed -e 's/ .*$//' | head -n 1`"
         command="`which "$command"`"
         readlink -f "$command"
         return
@@ -512,7 +512,7 @@
     local client
     local desktop
     desktop=`xdg-mime query default "x-scheme-handler/mailto"`
- client=`desktop_file_to_binary "$browser"`
+ client=`desktop_file_to_binary "$desktop"`
     echo $client | grep thunderbird > /dev/null 2>&1
     if [ $? -eq 0 ] ; then
         run_thunderbird "$client" "$1"