Using 8.3 file names with pdfLaTeX

Hi,

pdflatex.exe doesn't work anymore with 8.3 file names containing a '~' 
since the last update. It was working previously.

I have a tex file in the "c:\users\administrateur\Desktop\Test" folder. 
On a command line, it works if I call pdflatex with the long file name 
(pdflatex c:\users\administrateur\Desktop\Test\tmp.tex) but not if I use 
the short one (pdflatex c:\users\admini~1\Desktop\Test\tmp.tex) (see 
outputs below). The same thing appends with latex.exe as well.

Same as this thread:
http://tex.stackexchange.com/questions/183568/using-8-3-path-names-with-pdflatex

The reason why I need it to work with 8.3 file names is that I'm using 
Inkscape TexText extension who creates a temporary .tex file in the 
%temp% folder which is stored in a 8.3 format.

########### Long filename BEGIN ###########

C:\>pdflatex c:\users\administrateur\Desktop\Test\tmp.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (MiKTeX 2.9 64-bit)
entering extended mode
(c:/users/administrateur/Desktop/Test/tmp.tex
LaTeX2e <2015/01/01> patch level 2
Babel <3.9m> and hyphenation patterns for 69 languages loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"))

LaTeX Warning: Unused global option(s):
     [a0].

(tmp.aux) [1{C:/localtexmf/pdftex/config/pdftex.map}] (tmp.aux) 
)<C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr10.pfb>
Output written on tmp.pdf (1 page, 10795 bytes).

########### Long filename END ###########


########### Short filename BEGIN ###########
C:\>pdflatex c:\users\admini~1\Desktop\Test\tmp.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (MiKTeX 2.9 64-bit)
entering extended mode
! I can't find file `c:/users/admini'.
<to be read again>
\protect
<*> c:/users/admini~
1/Desktop/Test/tmp.tex
Please type another input file name:
! Emergency stop.
<to be read again>
\protect
<*> c:/users/admini~
1/Desktop/Test/tmp.tex
! ==> Fatal error occurred, no output PDF file produced!
Transcript written on texput.log.

########### Short filename END ###########


########### dir BEGIN ###########
C:\>dir c:\users\admini~1\Desktop\Test\tmp.tex
Le volume dans le lecteur C n'a pas de nom.
Le numéro de série du volume est 6E63-DC99

Répertoire de c:\users\admini~1\Desktop\Test

2015-09-10 14:48 176 tmp.tex
1 fichier(s) 176 octets
0 Rép(s) 368 110 231 552 octets libres

########### dir END ###########

Regards,
Patrick

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