Bug #1995: CommandTAcceptSelection error

Hi, I am receiving following error:

Messages maintainer: Bram Moolenaar <Bram@vim.org>
Error detected while processing function CommandTAcceptSelection:
line    1:
E90: Cannot unload last buffer
Error detected while processing BufLeave Auto commands for "<buffer=5>":
E90: Cannot unload last buffer
E90: Cannot unload last buffer

Not sure what is the reason. I am running command-t 1.4 on Fedora 17:

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]

$ vim --version
VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Jun 18 2012 09:17:13)
Použité záplaty: 1-415, 417-556
Modified by <bugzilla@redhat.com>
přeložil  <bugzilla@redhat.com>
maximální verzebez grafického rozhraní
 Vlastnosti zahrnuté (+) a nezahrnuté (-):
+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 +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 +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
 -xterm_clipboard -xterm_save 
   systémový vimrc soubor: "/etc/vimrc"
     uživatelský vimrc soubor: "$HOME/.vimrc"
      uživatelský exrc soubor: "$HOME/.exrc"
  implicitní hodnota $VIM:"/etc"
  implicitní hodnota $VIMRUNTIME: "/usr/share/vim/vim73"
Překlad: gcc -c -I. -Iproto -DHAVE_CONFIG_H   -I/usr/local/include  -O2 -g -pipe -Wall  -fexceptions -fstack-protector --param=ssp-buffer-size=4  -m64 -mtune=generic -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1      
Linkuji: gcc   -L. -Wl,-z,relro -rdynamic -Wl,-export-dynamic  -Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE  -Wl,-z,relro  -L/usr/local/lib -Wl,--as-needed -o vim       -lm -lnsl  -lselinux  -lncurses -lacl -lattr -lgpm -ldl    -Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE  -fstack-protector  -L/usr/lib64/perl5/CORE -lperl -lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc -L/usr/lib64/python2.7/config -lpython2.7 -lpthread -ldl -lutil -lm -Xlinker -export-dynamic   -lruby -lpthread -lrt -ldl -lcrypt -lm