diff -r b478eb3f1a0d -r 31d3fbe0c9a2 src/cm/utils/comment_positioning.py
--- a/src/cm/utils/comment_positioning.py	Thu Jan 31 14:54:07 2013 +0100
+++ b/src/cm/utils/comment_positioning.py	Thu Jan 31 14:54:54 2013 +0100
@@ -65,7 +65,6 @@
     for cc in commentList:        
         if cc.valid:
             for id in xrange(len(span_starts_new.keys())):
-                if (span_starts_new.get(id)):
                 start = span_starts_new.get(id, 0)
                 end = span_starts_new.get(id+1, sys.maxint)