Description of problem:
 If I run the binary version of CALIBRE, I can fetch custom news sources.
 The same recipe on the Fedora 12 version cannot fetch custom news sources.
 Following is the recipe and tail of the log:

 ===== recipe =====
 class AdvancedUserRecipe1264697614(BasicNewsRecipe):
     title          = u'SANS INFOCon'
     oldest_article = 7
     max_articles_per_feed = 100

     feeds          = [(u'Internet Storm Center Infocon',
 u'http://images.dshield.org/rssfeed.xml')]

 ===== log tail =====
 Flattening CSS and remapping font sizes...
 Traceback (most recent call last):
   File "/usr/bin/calibre-parallel", line 19, in <module>
     sys.exit(main())
   File "/usr/lib/calibre/calibre/utils/ipc/worker.py", line 98, in main
     result = func(*args, **kwargs)
   File "/usr/lib/calibre/calibre/gui2/convert/gui_conversion.py", line 24,
 in gui_convert
     plumber.run()
   File "/usr/lib/calibre/calibre/ebooks/conversion/plumber.py", line 825,
 in run
     flattener(self.oeb, self.opts)
   File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line
 122, in __call__
     self.stylize_spine()
   File "/usr/lib/calibre/calibre/ebooks/oeb/transforms/flatcss.py", line
 146, in stylize_spine
     extra_css=css)
   File "/usr/lib/calibre/calibre/ebooks/oeb/stylizer.py", line 169, in
 __init__
     rules.extend(self.flatten_rule(rule, href, index))
   File "/usr/lib/calibre/calibre/ebooks/oeb/stylizer.py", line 233, in
 flatten_rule
     style = self.flatten_style(rule.style)
   File "/usr/lib/calibre/calibre/ebooks/oeb/stylizer.py", line 253, in
 flatten_style
     style.update(self._normalize_font(prop.cssValue))
   File "/usr/lib/calibre/calibre/ebooks/oeb/stylizer.py", line 343, in
 _normalize_font
     if cssprofiles.validate(key, value):
 AttributeError: 'module' object has no attribute 'validate'


Version-Release number of selected component (if applicable): 0.6.35


How reproducible: every time with any custom recipe


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: