Good afternoon,

I updated my TL-2011 packages today. Now, expl3 doesn't work anymore.

  \listfiles
  \documentclass{minimal}
  
  \usepackage{expl3}
  
  \begin{document}
  \ExplSyntaxOn
    \tl_new:Nn\g_example_tl{hello!}
    \g_example_tl
  \ExplSyntaxOff
  \end{document}

leads to:

  ! Undefined control sequence.
  l.8   \tl_new:Nn
                  \g_example_tl{hello!}
  ? q

What is going on?

Regards,
Alexander

 *File List*
 minimal.cls    2001/05/25 Standard LaTeX minimal class
   expl3.sty    2011/10/09 v2900 L3 Experimental code bundle wrapper
 l3names.sty    2011/10/09 v2896 L3 Experimental namespace for primitives
l3bootstrap.sty    2011/09/10 v2798 L3 Experimental bootstrap code
    etex.sty    1998/03/26 v2.0 eTeX basic definition package (PEB)
    calc.sty    2007/08/22 v4.3 Infix arithmetic (KKT,FJ)
   color.sty    2005/11/14 v1.0j Standard LaTeX Color (DPC)
   color.cfg    2007/01/18 v1.5 color configuration of teTeX/TeXLive
   dvips.def    1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
dvipsnam.def    1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
graphics.sty    2009/02/05 v1.0o Standard LaTeX Graphics (DPC,SPQR)
    trig.sty    1999/03/16 v1.09 sin cos tan (DPC)
graphics.cfg    2010/04/23 v1.9 graphics configuration of TeX Live
l3basics.sty    2011/10/09 v2896 L3 Experimental basic definitions
 l3expan.sty    2011/10/09 v2896 L3 Experimental argument expansion
    l3tl.sty    2011/09/16 v2831 L3 Experimental token lists
   l3seq.sty    2011/10/09 v2896 L3 Experimental sequences and stacks
   l3int.sty    2011/10/09 v2896 L3 Experimental integers
 l3quark.sty    2011/10/09 v2896 L3 Experimental quarks
   l3prg.sty    2011/10/09 v2896 L3 Experimental control structures
 l3clist.sty    2011/10/09 v2896 L3 Experimental comma separated lists
 l3token.sty    2011/10/09 v2896 L3 Experimental token manipulation
  l3prop.sty    2011/09/17 v2839 L3 Experimental property lists
   l3msg.sty    2011/10/09 v2896 L3 Experimental messages
    l3io.sty    2011/10/09 v2896 L3 Experimental input-output operations
  l3file.sty    2011/10/09 v2896 L3 Experimental file operations
  l3skip.sty    2011/10/09 v2896 L3 Experimental dimensions and skips
  l3keys.sty    2011/09/10 v2800 L3 Experimental key-value interfaces
    l3fp.sty    2011/09/26 v2857 L3 Experimental floating-point operations
   l3box.sty    2011/10/09 v2896 L3 Experimental boxes
l3coffins.sty    2011/09/12 v2814 L3 Experimental coffin code layer
 l3color.sty    2011/09/07 v2776 L3 Experimental colour support
l3luatex.sty    2011/09/10 v2798 L3 Experimental LuaTeX-specific functions
 ***********