Hi,
the WXAgg backend of 0.84 produces segfaults on linux using wxPython2.6-gtk2-unicode-2.6.1.0-1_py2.3.
This is the debugging output:
ck@...801...:~/testarea/matplotlib-0.84/examples> python pcolor_demo2.py -dWXAgg
loaded rc file /home/ck/.matplotlib/matplotlibrc
matplotlib version 0.84
verbose.level debug
interactive is False
platform is linux2
loaded modules: ['pylab', '__future__', 'copy_reg', 'sre_compile', 'distutils', 'itertools', '_sre', 'japanese.aliases', 'site', '__builtin__', 'datetime', 'matplotlib.tempfile', 'encodings', 'encodings.encodings', 'sre_constants', 'distutils.string', 'dateutil', 'matplotlib.datetime', 'posixpath', '_random', 'tempfile', 'errno', 'matplotlib.warnings', 'encodings.codecs', 'matplotlib.sys', 'pytz.datetime', 're', 'os.path', 'pytz.sys', '_codecs', 'distutils.sysconfig', 'encodings.exceptions', 'pytz.sets', 'math', 'fcntl', 'stat', 'zipimport', 'string', 'warnings', 'encodings.types', 'UserDict', 'sets', 'encodings.utf_8', 'matplotlib', 'japanese', 'sys', 'japanese.aliases.encodings', 'pytz.tzinfo', 'pytz', '__main__', 'matplotlib.__future__', 'codecs', 'distutils.re', 'matplotlib.pytz', 'types', 'strop', 'matplotlib.dateutil', 'matplotlib.os', 'thread', 'sre', 'bisect', 'matplotlib.distutils', 'signal', 'distutils.errors', 'random', 'linecache', 'distutils.os', 'posix', 'encodings.aliases', 'time', 'exceptions', 'sre_parse', 'pytz.bisect', 'distutils.sys', 'os']
numerix Numeric 23.3
font search path ['/usr/share/matplotlib']
trying fontname /usr/share/matplotlib/VeraIt.ttf
trying fontname /usr/share/matplotlib/VeraMoIt.ttf
trying fontname /usr/share/matplotlib/cmsy10.ttf
trying fontname /usr/share/matplotlib/VeraSe.ttf
trying fontname /usr/share/matplotlib/cmmi10.ttf
trying fontname /usr/share/matplotlib/Vera.ttf
$HOME=/home/ck
CONFIGDIR=/home/ck/.matplotlib
loaded ttfcache file /home/ck/.matplotlib/ttffont.cache
matplotlib data path /usr/share/matplotlib
backend WXAgg version 2.6.1.0
findfont failed Lucida Grande
findfont failed Verdana
findfont failed Geneva
findfont failed Lucida
findfont found Bitstream Vera Sans, normal, normal 500, normal, 12.0
findfont returning /usr/share/matplotlib/Vera.ttf
Segmentation fault
Christian