diff --git a/.travis.yml b/.travis.yml
index 5fc0240..028ca78 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ env:
     - PATH=$DEPS/bin:$PATH
 matrix:
   include:
-    - env: ENV=vim72
+    - env: ENV=vim74
       rvm: 1.8.7
       addons: { apt: { packages: [vim-nox] } }
     - env: ENV=python
@@ -26,7 +26,7 @@ install: |
   git config --global user.email "you@example.com"
   git config --global user.name "Your Name"
 
-  if [ "$ENV" == "vim72" ]; then
+  if [ "$ENV" == "vim74" ]; then
     mkdir -p ${DEPS}/bin
     ln -s /usr/bin/vim.nox ${DEPS}/bin/vim
     return
diff --git a/README.md b/README.md
index 427ca54..5e47b1b 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,7 @@ Reload .vimrc and `:PlugInstall` to install plugins.
 | ----------------------------------- | ------------------------------------------------------------------ |
 | `PlugInstall [name ...] [#threads]` | Install plugins                                                    |
 | `PlugUpdate [name ...] [#threads]`  | Install or update plugins                                          |
-| `PlugClean[!]`                      | Remove (Uninstall) unused plugin directories (bang version will clean without prompt) |
+| `PlugClean[!]`                      | Remove (Uninstall) unlisted plugins (bang version will clean without prompt) |
 | `PlugUpgrade`                       | Upgrade vim-plug itself                                            |
 | `PlugStatus`                        | Check the status of plugins                                        |
 | `PlugDiff`                          | Examine changes from the previous update and the pending changes   |
diff --git a/doc/plug.txt b/doc/plug.txt
index 6a5c602..7f3eaa0 100644
--- a/doc/plug.txt
+++ b/doc/plug.txt
@@ -194,7 +194,7 @@ Reload .vimrc and `:PlugInstall` to install plugins.
  ------------------------------------+-------------------------------------------------------------------
   `PlugInstall [name ...] [#threads]`  | Install plugins
   `PlugUpdate [name ...] [#threads]`   | Install or update plugins
-  `PlugClean[!]`                       | Remove unused directories (bang version will clean without prompt)
+  `PlugClean[!]`                       | Remove unlisted plugins (bang version will clean without prompt)
   `PlugUpgrade`                        | Upgrade vim-plug itself
   `PlugStatus`                         | Check the status of plugins
   `PlugDiff`                           | Examine changes from the previous update and the pending changes
diff --git a/plug.vim b/plug.vim
index db1f615..afb1772 100644
--- a/plug.vim
+++ b/plug.vim
@@ -434,8 +434,8 @@ endfunction
 
 function! s:dobufread(names)
   for name in a:names
-    let path = s:rtp(g:plugs[name]).'/**'
-    for dir in ['ftdetect', 'ftplugin']
+    let path = s:rtp(g:plugs[name])
+    for dir in ['ftdetect', 'ftplugin', 'after/ftdetect', 'after/ftplugin']
       if len(finddir(dir, path))
         if exists('#BufRead')
           doautocmd BufRead
@@ -794,9 +794,7 @@ endfunction
 
 function! s:chsh(swap)
   let prev = [&shell, &shellcmdflag, &shellredir]
-  if s:is_win
-    set shell=cmd.exe shellcmdflag=/c shellredir=>%s\ 2>&1
-  elseif a:swap
+  if !s:is_win && a:swap
     set shell=sh shellredir=>%s\ 2>&1
   endif
   return prev
@@ -811,7 +809,7 @@ function! s:bang(cmd, ...)
     if s:is_win
       let batchfile = tempname().'.bat'
       call writefile(["@echo off\r", cmd . "\r"], batchfile)
-      let cmd = batchfile
+      let cmd = s:shellesc(expand(batchfile))
     endif
     let g:_plug_bang = (s:is_win && has('gui_running') ? 'silent ' : '').'!'.escape(cmd, '#!%')
     execute "normal! :execute g:_plug_bang\<cr>\<cr>"
@@ -1210,7 +1208,7 @@ function! s:spawn(name, cmd, opts)
   let cmd = has_key(a:opts, 'dir') ? s:with_cd(a:cmd, a:opts.dir) : a:cmd
   if !empty(job.batchfile)
     call writefile(["@echo off\r", cmd . "\r"], job.batchfile)
-    let cmd = job.batchfile
+    let cmd = s:shellesc(expand(job.batchfile))
   endif
   let argv = add(s:is_win ? ['cmd', '/c'] : ['sh', '-c'], cmd)
 
@@ -2037,9 +2035,9 @@ function! s:system(cmd, ...)
     if s:is_win
       let batchfile = tempname().'.bat'
       call writefile(["@echo off\r", cmd . "\r"], batchfile)
-      let cmd = batchfile
+      let cmd = s:shellesc(expand(batchfile))
     endif
-    return system(s:is_win ? '('.cmd.')' : cmd)
+    return system(cmd)
   finally
     let [&shell, &shellcmdflag, &shellredir] = [sh, shellcmdflag, shrd]
     if s:is_win
@@ -2224,7 +2222,7 @@ function! s:upgrade()
   let new = tmp . '/plug.vim'
 
   try
-    let out = s:system(printf('git clone --depth 1 %s %s', s:plug_src, tmp))
+    let out = s:system(printf('git clone --depth 1 %s %s', s:shellesc(s:plug_src), s:shellesc(tmp)))
     if v:shell_error
       return s:err('Error upgrading vim-plug: '. out)
     endif
@@ -2371,7 +2369,7 @@ function! s:preview_commit()
     if s:is_win
       let batchfile = tempname().'.bat'
       call writefile(["@echo off\r", cmd . "\r"], batchfile)
-      let cmd = batchfile
+      let cmd = expand(batchfile)
     endif
     execute 'silent %!' cmd
   finally
@@ -2420,7 +2418,11 @@ function! s:diff()
     call s:append_ul(2, origin ? 'Pending updates:' : 'Last update:')
     for [k, v] in plugs
       let range = origin ? '..origin/'.v.branch : 'HEAD@{1}..'
-      let diff = s:system_chomp('git log --graph --color=never '.join(map(['--pretty=format:%x01%h%x01%d%x01%s%x01%cr', range], 's:shellesc(v:val)')), v.dir)
+      let cmd = 'git log --graph --color=never '.join(map(['--pretty=format:%x01%h%x01%d%x01%s%x01%cr', range], 's:shellesc(v:val)'))
+      if has_key(v, 'rtp')
+        let cmd .= ' -- '.s:shellesc(v.rtp)
+      endif
+      let diff = s:system_chomp(cmd, v.dir)
       if !empty(diff)
         let ref = has_key(v, 'tag') ? (' (tag: '.v.tag.')') : has_key(v, 'commit') ? (' '.v.commit) : ''
         call append(5, extend(['', '- '.k.':'.ref], map(s:lines(diff), 's:format_git_log(v:val)')))
diff --git a/test/workflow.vader b/test/workflow.vader
index 5bd14e1..7e2c352 100644
--- a/test/workflow.vader
+++ b/test/workflow.vader
@@ -537,6 +537,51 @@ Execute (PlugDiff):
   Assert !empty(mapcheck("\<cr>"))
   q
 
+Execute (Do not show diff for commits outside of rtp):
+  call plug#begin()
+  call plug#end()
+  PlugClean!
+
+  call plug#begin()
+  Plug 'file://'.expand('$PLUG_FIXTURES').'/xxx'
+  Plug 'file://'.expand('$PLUG_FIXTURES').'/yyy', { 'rtp': 'rtp' }
+  call plug#end()
+  PlugInstall
+  Log getline(1, '$')
+
+  call system('cd "$PLUG_FIXTURES/xxx" && git commit --allow-empty -m update-xxx && git tag -f xxx')
+  call system('cd "$PLUG_FIXTURES/yyy" && git commit --allow-empty -m update-yyy && git tag -f yyy')
+
+  let g:plugs.yyy.tag = 'yyy'
+  PlugUpdate
+  Log getline(1, '$')
+
+  PlugDiff
+  " 1 plugin(s) updated.
+  " [==]
+  "
+  " Last update:
+  " ------------
+  "
+  " - xxx:
+  "   * 7faa9b2 update-xxx (0 seconds ago)
+  "
+  " Pending updates:
+  " ----------------
+  "
+  " N/A
+  "
+  Log getline(1, '$')
+  AssertEqual 14, line('$')
+  AssertEqual '1 plugin(s) updated.', getline(1)
+  AssertEqual '[==]', getline(2)
+  AssertEqual 'Last update:', getline(4)
+  AssertEqual '- xxx:', getline(7)
+  Assert !empty(mapcheck('o'))
+  Assert !empty(mapcheck('X'))
+  Assert !empty(mapcheck("\<cr>"))
+  q
+
 **********************************************************************
 ~ On-demand loading / Partial installation/update ~
 **********************************************************************