Problem with forest after last update

Today I've found a problem with `forest` package. Something so simple like

\documentclass{article}
\usepackage{forest}
\listfiles
\begin{document}
\begin{forest}
[A]
\end{forest}
\end{document}

fails. The first error shown is

---------------------------
[Loading MPS to PDF converter (version 2006.09.02).]
)
! Undefined control sequence.
<argument> \locbox
                    \forest@temp@box \forestolet {box}\forest@temp@box
l.7 \end{forest}

? s
OK, entering \scrollmode...
---------------------------

after entering `s`, it shows several error messages and finishes with a 
wrong pdf.

The result form listfiles is:

  *File List*
  article.cls    2014/09/29 v1.4h Standard LaTeX document class
   size10.clo    2014/09/29 v1.4h Standard LaTeX file (size option)
   forest.sty    2014/03/07 v1.05 Drawing (linguistic) trees
     tikz.sty    2013/12/13 v3.0.0 (rcs-revision 1.142)
      pgf.sty    2013/12/18 v3.0.0 (rcs-revision 1.14)
   pgfrcs.sty    2013/12/20 v3.0.0 (rcs-revision 1.28)
everyshi.sty    2001/05/15 v3.00 EveryShipout Package (MS)
   pgfrcs.code.tex
  pgfcore.sty    2010/04/11 v3.0.0 (rcs-revision 1.7)
graphicx.sty    2014/10/28 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
   keyval.sty    2014/10/28 v1.15 key=value parser (DPC)
graphics.sty    2014/10/28 v1.0p Standard LaTeX Graphics (DPC,SPQR)
     trig.sty    1999/03/16 v1.09 sin cos tan (DPC)
graphics.cfg    2007/01/18 v1.5 graphics configuration of teTeX/TeXLive
   pdftex.def    2011/05/27 v0.06d Graphics/color for pdfTeX
infwarerr.sty    2010/04/08 v1.3 Providing info/warning/error messages (HO)
  ltxcmds.sty    2011/11/09 v1.22 LaTeX kernel commands for general use (HO)
   pgfsys.sty    2013/11/30 v3.0.0 (rcs-revision 1.47)
   pgfsys.code.tex
pgfsyssoftpath.code.tex    2013/09/09  (rcs-revision 1.9)
pgfsysprotocol.code.tex    2006/10/16  (rcs-revision 1.4)
   xcolor.sty    2007/01/21 v2.11 LaTeX color extensions (UK)
    color.cfg    2007/01/18 v1.5 color configuration of teTeX/TeXLive
  pgfcore.code.tex
pgfcomp-version-0-65.sty    2007/07/03 v3.0.0 (rcs-revision 1.7)
pgfcomp-version-1-18.sty    2007/07/23 v3.0.0 (rcs-revision 1.1)
   pgffor.sty    2013/12/13 v3.0.0 (rcs-revision 1.25)
  pgfkeys.sty
  pgfkeys.code.tex
  pgfmath.sty
  pgfmath.code.tex
   pgffor.code.tex
     tikz.code.tex
  pgfopts.sty    2014/07/10 v2.1a LaTeX package options with pgfkeys
etoolbox.sty    2015/05/04 v2.2 e-TeX tools for LaTeX (JAW)
  environ.sty    2014/05/04 v0.3 A new way to define environments
trimspaces.sty    2009/09/17 v1.1 Trim spaces around a token list
supp-pdf.mkii
  ***********

Forest was working in my system on april, 21st and I used again today.
In the mean time only a miktex-update after april, 24th.

Anybody knows what can be wrong in my system? Does forest work for you?

Thank you,

Ignasi

-- 
-----------------------------------------------------------------
Ignasi Furió Caldentey
Universitat de les Illes Balears
Escola Politècnica Superior
Dep. Matematiques i Informatica
Crta. Valldemossa, km. 7,5. 07122-Palma. SPAIN
tel: (+34) 971.259.970    fax: (+34) 971.173.003
e-mail: ignasi dot furio at uib dot cat
http://www.uib.cat
-----------------------------------------------------------------

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