diff --git a/ftplugin/quicktask.vim b/ftplugin/quicktask.vim
index 1196490..11d3893 100755
--- a/ftplugin/quicktask.vim
+++ b/ftplugin/quicktask.vim
@@ -23,6 +23,17 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
+" Boilerplate for ftplugins. {{{1
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+if !exists('b:undo_ftplugin')
+  let b:undo_ftplugin = ''
+endif
+let b:undo_ftplugin .= '|setlocal comments< formatoptions< spell< wrap< textwidth< expandtab< shiftwidth< tabstop< iskeyword< foldmethod< foldexpr< fillchars< foldtext<'
+
 " Set all buffer-local settings: {{{1
 setlocal comments=b:#,f:-,f:*
 setlocal formatoptions=qnwta
@@ -1044,28 +1055,32 @@ nmap <silent> <Plug>FindIncompleteTimestamps :call <SID>FindIncompleteTimestamps
 nmap <silent> <Plug>OpenSnipUnderCursor      :call <SID>OpenSnip()<CR>
 
 " Public mappings {{{1
-if ! g:quicktask_no_mappings
-    nmap <unique> <Leader>tv  <Plug>SelectTask
-    nmap <unique> <Leader>tD  <Plug>TaskComplete
-    nmap <unique> <Leader>ta  <Plug>ShowActiveTasksOnly
-    nmap <unique> <Leader>tw  <Plug>ShowWatchedTasksOnly
-    nmap <unique> <Leader>ty  <Plug>ShowTodayTasksOnly
-    nmap <unique> <Leader>ts  <Plug>AddNextTimeToTask
-    nmap <unique> <Leader>tO  <Plug>AddTaskAbove
-    nmap <unique> <Leader>to  <Plug>AddTaskBelow
-    nmap <unique> <Leader>tn  <Plug>AddNoteToTask
-    nmap <unique> <Leader>tc  <Plug>AddChildTask
-    nmap <unique> <Leader>tu  <Plug>MoveTaskUp
-    nmap <unique> <Leader>td  <Plug>MoveTaskDown
-    nmap <unique> <Leader>tS  <Plug>AddSnipToTask
-    nmap <unique> <Leader>tfi <Plug>FindIncompleteTimestamps
-    nmap          <CR>        <Plug>OpenSnipUnderCursor
+if ! g:quicktask_no_mappings && ! exists('b:quicktask_did_mappings')
+    nmap <unique><buffer> <Leader>tv  <Plug>SelectTask
+    nmap <unique><buffer> <Leader>tD  <Plug>TaskComplete
+    nmap <unique><buffer> <Leader>ta  <Plug>ShowActiveTasksOnly
+    nmap <unique><buffer> <Leader>tw  <Plug>ShowWatchedTasksOnly
+    nmap <unique><buffer> <Leader>ty  <Plug>ShowTodayTasksOnly
+    nmap <unique><buffer> <Leader>ts  <Plug>AddNextTimeToTask
+    nmap <unique><buffer> <Leader>tO  <Plug>AddTaskAbove
+    nmap <unique><buffer> <Leader>to  <Plug>AddTaskBelow
+    nmap <unique><buffer> <Leader>tn  <Plug>AddNoteToTask
+    nmap <unique><buffer> <Leader>tc  <Plug>AddChildTask
+    nmap <unique><buffer> <Leader>tu  <Plug>MoveTaskUp
+    nmap <unique><buffer> <Leader>td  <Plug>MoveTaskDown
+    nmap <unique><buffer> <Leader>tS  <Plug>AddSnipToTask
+    nmap <unique><buffer> <Leader>tfi <Plug>FindIncompleteTimestamps
+    nmap <unique><buffer> <CR>        <Plug>OpenSnipUnderCursor
+    let b:quicktask_did_mappings = 1
 endif
 
 " ============================================================================
 " Autocommands {{{1
 if g:quicktask_autosave
-    autocmd BufLeave,FocusLost * call <SID>SaveOnFocusLost()
+    augroup quicktask
+      au!
+      autocmd BufLeave,FocusLost * call <SID>SaveOnFocusLost()
+    augroup END
 endif
 
 " ============================================================================