we can launch Gajim even if we have no connection (this will have to be launched in a thread)

src/common/check_for_new_version.py

@@ -33,7 +33,10 @@ GTKGUI_GLADE='gtkgui.glade'
 class Check_for_new_version_dialog:
 	def __init__(self, plugin):
 		self.plugin = plugin
-		self.check_for_new_version()
+		try:
+			self.check_for_new_version()
+		except:
+			pass
 
 	def parse_glade(self):
 		xml = gtk.glade.XML(GTKGUI_GLADE, 'new_version_available_dialog', APP)