diff --git a/src/libprs500/__init__.py b/src/libprs500/__init__.py
index 96a417cbfc..01e4bc8f6f 100644
--- a/src/libprs500/__init__.py
+++ b/src/libprs500/__init__.py
@@ -13,7 +13,7 @@
 ##    with this program; if not, write to the Free Software Foundation, Inc.,
 ##    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 ''' E-book management software'''
-__version__   = "0.3.46"
+__version__   = "0.3.47"
 __docformat__ = "epytext"
 __author__    = "Kovid Goyal <kovid@kovidgoyal.net>"
 
diff --git a/src/libprs500/devices/__init__.py b/src/libprs500/devices/__init__.py
index a37a0ddab9..5391abc7c1 100644
--- a/src/libprs500/devices/__init__.py
+++ b/src/libprs500/devices/__init__.py
@@ -13,5 +13,5 @@
 ##    with this program; if not, write to the Free Software Foundation, Inc.,
 ##    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 '''
-Device drivers
-'''
\ No newline at end of file
+Device drivers.
+'''
diff --git a/src/libprs500/devices/interface.py b/src/libprs500/devices/interface.py
index c0ea879e78..c20ea429b0 100644
--- a/src/libprs500/devices/interface.py
+++ b/src/libprs500/devices/interface.py
@@ -44,6 +44,11 @@ class Device(object):
         """
         raise NotImplementedError()
     
+    @classmethod
+    def is_connected(cls):
+        '''Return True iff the device is physically connected to the computer'''
+        raise NotImplementedError()
+    
     def get_device_information(self, end_session=True):
         """ 
         Ask device for device information. See L{DeviceInfoQuery}. 
diff --git a/src/libprs500/ebooks/lrf/__init__.py b/src/libprs500/ebooks/lrf/__init__.py
index 1d53413ac5..97a3945bbe 100644
--- a/src/libprs500/ebooks/lrf/__init__.py
+++ b/src/libprs500/ebooks/lrf/__init__.py
@@ -106,8 +106,8 @@ def Book(options, font_delta=0, header=None,
         ps['header'] = hdr
         ps['topmargin'] = 10
         ps['textheight'] = profile.screen_height - (options.bottom_margin + ps['topmargin']) - profile.fudge
-    baselineskip = (12 + 2*font_delta)*10
-    return _Book(textstyledefault=dict(fontsize=100+font_delta*20, 
+    baselineskip = 120 + int(20*font_delta)
+    return _Book(textstyledefault=dict(fontsize=100+int(font_delta*20), 
                                        parindent=80, linespace=12,
                                        baselineskip=baselineskip), \
                  pagestyledefault=ps, **settings)
\ No newline at end of file
diff --git a/src/libprs500/ebooks/lrf/html/convert_from.py b/src/libprs500/ebooks/lrf/html/convert_from.py
index 9ace1fcc99..fe675fd01e 100644
--- a/src/libprs500/ebooks/lrf/html/convert_from.py
+++ b/src/libprs500/ebooks/lrf/html/convert_from.py
@@ -124,7 +124,7 @@ class Span(_Span):
                 elif "large" in val >= 0:
                     ans = 120
             if ans is not None: 
-                ans += font_delta * 20
+                ans += int(font_delta * 20)
                 ans = str(ans)
             return ans
         
@@ -1222,9 +1222,9 @@ def parse_options(argv=None, cli=True):
     laf = parser.add_option_group('LOOK AND FEEL')
     laf.add_option('--cover', action='store', dest='cover', default=None, \
                       help='Path to file containing image to be used as cover')
-    laf.add_option('--font-delta', action='store', type='int', default=0, \
+    laf.add_option('--font-delta', action='store', type='float', default=0., \
                       help="""Increase the font size by 2 * FONT_DELTA pts and """
-                      '''the line spacing by FONT_DELTA pts. '''
+                      '''the line spacing by FONT_DELTA pts. FONT_DELTA can be a fraction.'''
                       """If FONT_DELTA is negative, the font size is decreased.""",
                       dest='font_delta')
     laf.add_option('--disable-autorotation', action='store_true', default=False, 
@@ -1266,7 +1266,7 @@ def parse_options(argv=None, cli=True):
             parser.print_help()
         raise ConversionError, 'no filename specified'
     if options.output:
-        options.output = os.path.abspath(os.path.expanduser(options.output))
+        options.output = os.path.abspath(os.path.expanduser(options.output))    
     return options, args, parser
 
 
diff --git a/upload b/upload
index 15a287c83b..666fb0b443 100644
--- a/upload
+++ b/upload
@@ -43,15 +43,15 @@ f.write(open(os.path.join(HTML2LRF, 'demo.html')).read())
 f.write('\n</pre>')
 f.close()
 
-       
+      
 check_call('''html2lrf --title='Demonstration of html2lrf' --author='Kovid Goyal' --header --output=/tmp/html2lrf.lrf %s/demo.html'''%(HTML2LRF,))
 check_call('''scp /tmp/html2lrf.lrf castalia:%s/'''%(DOWNLOADS,))
-check_call('''python setup.py register sdist bdist_egg upload''')
 
 check_call('''ssh castalia rm -f %s/libprs500\*.exe'''%(DOWNLOADS,))
 check_call('''scp dist/%s castalia:%s/'''%(exe, DOWNLOADS))
 check_call('''ssh castalia chmod a+r %s/\*'''%(DOWNLOADS,))
 check_call('''ssh castalia /root/bin/update-installer-link %s'''%(exe,))
+check_call('''python setup.py register sdist bdist_egg upload''')
 
 check_call('''epydoc --config epydoc.conf''')
 check_call('''scp -r docs/html castalia:%s/'''%(DOCS,))