diff --git a/plugins/Math/plugin.py b/plugins/Math/plugin.py
index ea03b0064..00a78cf67 100644
--- a/plugins/Math/plugin.py
+++ b/plugins/Math/plugin.py
@@ -102,7 +102,10 @@ class Math(callbacks.Plugin):
             return cmath.sqrt(x)
         else:
             return math.sqrt(x)
+    def _cbrt(x):
+        return math.pow(x, 1.0/3)
     _mathEnv['sqrt'] = _sqrt
+    _mathEnv['cbrt'] = _cbrt
     _mathEnv['abs'] = abs
     _mathEnv['max'] = max
     _mathEnv['min'] = min
diff --git a/plugins/Misc/plugin.py b/plugins/Misc/plugin.py
index 9f459d2e3..8b8b47882 100644
--- a/plugins/Misc/plugin.py
+++ b/plugins/Misc/plugin.py
@@ -302,7 +302,7 @@ class Misc(callbacks.Plugin):
                 version = ''.join(version.rsplit(':', 1))
                 # Replace the last '-' by '+':
                 version = '+'.join(version.rsplit('-', 1))
-                versions[branch] = version
+                versions[branch] = version.encode('utf-8')
             newest = _('The newest versions available online are %s.') % \
                     ', '.join([_('%s (in %s)') % (y,x)
                                for x,y in versions.items()])
diff --git a/plugins/PluginDownloader/plugin.py b/plugins/PluginDownloader/plugin.py
index 89db121cd..8812f6805 100644
--- a/plugins/PluginDownloader/plugin.py
+++ b/plugins/PluginDownloader/plugin.py
@@ -172,9 +172,7 @@ class GithubRepository(GitRepository):
         archive = self._download(plugin)
         prefix = archive.getnames()[0]
         dirname = ''.join((self._path, plugin))
-        print repr(prefix + dirname + '/README.txt')
         for file in archive.getmembers():
-            print repr(file)
             if file.name == prefix + dirname + '/README.txt':
                 extractedFile = archive.extractfile(file)
                 return extractedFile.read()
@@ -263,6 +261,8 @@ class PluginDownloader(callbacks.Plugin):
     which are available in that repository. When you want to install plugin,
     just run command "install <repository> <plugin>"."""
 
+    threaded = True
+
     @internationalizeDocstring
     def repolist(self, irc, msg, args, repository):
         """[<repository>]
diff --git a/plugins/Topic/plugin.py b/plugins/Topic/plugin.py
index b7f2c599d..20bd5389f 100644
--- a/plugins/Topic/plugin.py
+++ b/plugins/Topic/plugin.py
@@ -573,6 +573,24 @@ class Topic(callbacks.Plugin):
         self._sendTopics(irc, channel, topics)
     swap = wrap(swap, ['canChangeTopic', 'topicNumber', 'topicNumber'])
 
+    @internationalizeDocstring
+    def save(self, irc, msg, args, channel):
+        """[<channel>]
+
+        Saves the topic in <channel> to be restored with @topic default
+        later. <channel> is only necessary if the message isn't sent in
+        the channel itself.
+        """
+        if not self._checkManageCapabilities(irc, msg, channel):
+            capabilities = self.registryValue('requireManageCapability')
+            irc.errorNoCapability(capabilities, Raise=True)
+        topic = irc.state.getTopic(channel)
+        if topic:
+            self.setRegistryValue('default', value=topic, channel=channel)
+        else:
+            self.setRegistryValue('default', value='', channel=channel)
+    save = wrap(save, ['canChangeTopic'])
+
     @internationalizeDocstring
     def default(self, irc, msg, args, channel):
         """[<channel>]
diff --git a/setup.py b/setup.py
index 45332a3d3..543451b4a 100644
--- a/setup.py
+++ b/setup.py
@@ -52,6 +52,7 @@ import subprocess
 plugins = [s for s in os.listdir('plugins') if
            os.path.exists(os.path.join('plugins', s, 'plugin.py'))]
 
+version = None
 try:
     proc = subprocess.Popen('git show HEAD --format=%ci', shell=True,
             stdout=subprocess.PIPE)
@@ -60,14 +61,17 @@ try:
             .replace(' +', '+') \
             .replace(' ', 'T')
 
-    try:
-        os.unlink(os.path.join('src', 'version.py'))
-    except OSError: # Does not exist
-        pass
-    open(os.path.join('src', 'version.py'), 'a').write(
-            "version = '0.83.4.1+limnoria %s'\n" % version)
 except:
-    raise
+    pass
+if not version:
+    from time import gmtime, strftime
+    version = 'installed on ' + strftime("%Y-%m-%dT%H:%M:%S+0000", gmtime())
+try:
+    os.unlink(os.path.join('src', 'version.py'))
+except OSError: # Does not exist
+    pass
+open(os.path.join('src', 'version.py'), 'a').write(
+        "version = '0.83.4.1+limnoria %s'\n" % version)
 
 from src.version import version