Using the Xfce Terminal (0.4.8 as in xubuntu-12.04), I see
a bug with the terminal title when exiting Vim.  Vim does
not correctly restore the terminal title when exiting.

What steps will reproduce the problem?

1. Before starting Vim, look at the terminal title (top of terminal
   window). It says "Terminal".

2. Start Vim from terminal with:  vim -u NONE

3. The terminal window is changed by Vim and becomes:
   "Terminal - [No Name] - VIM"

4. Exit vim with ":q"

5. The terminal window becomes "Terminal - Terminal". 
   That's a bug. I would expect it to be restored to "Terminal"
   when exiting Vim.

6. If I repeat the steps 2, 3, 4, the terminal title
   becomes "Terminal - Terminal - Terminal".  Each time I exit
   Vim "- Terminal" is appended to the previous title which is
   not expected. So the terminal title keeps growing and growing
   as I start/exit Vim.

What version of the product are you using? On what operating system?

Bug happens with Vim-7.3.672 on xubuntu-12.04 (x86_64).

:version
VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Sep 24 2012 16:32:29)
Included patches: 1-672
Compiled by pel@nl1lxd-102827
Huge version with GTK2 GUI.  Features included (+) or not (-):
+arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset +cindent 
+clientserver +clipboard
+cmdline_compl +cmdline_hist +cmdline_info +comments +conceal +cryptv +cscope 
+cursorbind +cursorshape
 +dialog_con_gui +diff +digraphs +dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search +farsi
+file_in_path +find_in_path +float +folding -footer +fork() +gettext 
-hangul_input +iconv
+insert_expand +jumplist +keymap +langmap +libcall +linebreak +lispindent 
+listcmds +localmap -lua
+menu +mksession +modify_fname +mouse +mouseshape +mouse_dec +mouse_gpm 
-mouse_jsbterm +mouse_netterm
-mouse_sysmouse +mouse_xterm +mouse_urxvt +mouse_sgr +multi_byte +multi_lang 
-mzscheme +netbeans_intg
+path_extra -perl +persistent_undo +postscript +printer +profile -python 
-python3 +quickfix +reltime
+rightleft -ruby +scrollbind +signs +smartindent -sniff +startuptime 
+statusline -sun_workshop +syntax
 +tag_binary +tag_old_static -tag_any_white -tcl +terminfo +termresponse +textobjects +title +toolbar
+user_commands +vertsplit +virtualedit +visual +visualextra +viminfo +vreplace 
+wildignore +wildmenu
+windows +writebackup +X11 -xfontset +xim +xsmp_interact +xterm_clipboard 
-xterm_save
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
      user exrc file: "$HOME/.exrc"
  system gvimrc file: "$VIM/gvimrc"
    user gvimrc file: "$HOME/.gvimrc"
    system menu file: "$VIMRUNTIME/menu.vim"
  fall-back for $VIM: "/usr/local/share/vim"
Compilation: clang -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK  -pthread 
-I/usr/include/gtk-2.0 -I/us
r/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 
-I/usr/include/cairo -I/usr/include/gdk-p
ixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ 
-I/usr/include/glib-2.0 -I/usr/lib/x86_
64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 
-I/usr/include/libpng12
    -O1 -g -faddress-sanitizer -fno-omit-frame-pointer
Linking: clang   -O1 -g -faddress-sanitizer -fno-omit-frame-pointer -o vim   
-lgtk-x11-2.0 -lgdk-x11-2.
0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo 
-lpango-1.0 -lfreetype -
lfontconfig -lgobject-2.0 -lglib-2.0   -lSM -lICE -lXpm -lXt -lX11 -lXdmcp -lSM 
-lICE -lm -ltinfo -lnsl
  -lselinux -lacl -lattr -lgpm


Please provide any additional information below.

Bug does not happen when I start Vim with: vim -u NONE -c 'set notitle'.

Bug happens using Vim-7.3.672. But if I use the default Vim that comes
with xubuntu-12.04 (/usr/bin/vim) which is Vim-7.3.429, then bug does
not happen.

Furthermore, I cannot reproduce the bug with xterm or with
gnome-terminal.  It only happens with the Xfce terminal. 
So perhaps it's a bug with Xfce terminal.  But since older
Vim does not have this bug, it may also be Vim's fault.