Merged revisions 5360 via svnmerge from
https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_91_maint
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r5360 | jdh2358 | 2008-06-02 10:06:41 -0500 (Mon, 02 Jun 2008) | 1 line
added switch_backend bugfix from sf patch 1979402
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