Fix #2350 (conversion of a mobipocket file (huffdic compressed) fail)

src/calibre/ebooks/mobi/reader.py

@@ -382,6 +382,7 @@ class MobiReader(object):
                     }
         mobi_version = self.book_header.mobi_version
         for tag in root.iter(etree.Element):
+            tag.attrib.pop('xmlns', '')
             if tag.tag in ('country-region', 'place', 'placetype', 'placename',
                            'state', 'city', 'street', 'address', 'content'):
                 tag.tag = 'div' if tag.tag == 'content' else 'span'

src/calibre/utils/terminfo.py

@@ -177,6 +177,8 @@ class ProgressBar:
             self.width = self.term.COLS or 75
             self.bar = term.render(self.BAR)
             self.header = self.term.render(self.HEADER % header.center(self.width))
+            if isinstance(self.header, unicode):
+                self.header = self.header.encode('utf-8')
             self.cleared = 1 #: true if we haven't drawn the bar yet.
 
     def update(self, percent, message=''):