IIRC, this was fixed shortly after 1.4.0 and we are putting out a bugfix
release very soon (I think we are tagging the release candidate today).

On Wed, Oct 1, 2014 at 4:37 PM, skraelings notifications@github.com wrote:

OS: Archlinux
Python: 2.7.8
PyQt bindings: 5.3.2-1
Qt: 5.3.2-1
Matplotlib: 1.4.0-2

Steps to reproduce:

from matplotlib import pyplot as plt
y_data = [....]
plt.plot(y_data, 'k+')
plt.show()

then press the "Save the figure" icon, it shows the dialog to write a
filename. Then press Save, a model error window will pop-up complaining
that "png)')" is not a supporte file extension.

Digging further in matplotlib/backend_bases.py (~2098) tries to resolve
the extension by

    if cbook.is_string_like(filename):
        format = os.path.splitext(filename)[1][1:]

but filename is this unicode:
u"(u'/home/rbm/figure_1.png', u'Portable Network Graphics (*.png)')"

This in turn come from the qt5 backend filters:
Encapsulated Postscript (.eps);;Joint Photographic Experts Group (.jpeg .jpg);;PGF
code for LaTeX (.pgf);;Portable Document Format (.pdf);;Portable
Network Graphics (.png);;Postscript (.ps);;Raw RGBA bitmap (.raw .rgba);;Scalable
Vector Graphics (.svg .svgz);;Tagged Image File Format (.tif *.tiff)

This will fail for every other format whatever choose in the save dialog.
I tested the GTK backend and it doesn't have this problem.

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#3603.

Yes, this is a duplicate of #3454 fixed in #3469 .

There are two outstanding issues #3564 needs to be reviewed/merged (assuming I have unbroken building the docs) and #3517 which we are having trouble reproducing.

Great! Didn't look hard enough to see if this was already reported.