Hi,
See the bug here (and the answers) :
http://www.mail-archive.com/matplotlib-devel@lists.sourceforge.net/msg02348.html
From the last answer it appears this was fixed after 0.91.2
It affects saving png's (other formats work) from the GUI, but savefig()
should work.
Vincent
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Vincent Favre-Nicolin
Université Joseph Fourier
http://v.favrenicolin.free.fr
ObjCryst & Fox : http://objcryst.sourceforge.net