--- a/pylib/rbbz/rbbz/extension.py
+++ b/pylib/rbbz/rbbz/extension.py
@@ -261,18 +261,29 @@ def post_bugzilla_attachment(bugzilla, b
         if review.ship_it:
             reviewers[last_user.email] = True
 
     rr_url = get_obj_url(review_request)
     diff_url = '%sdiff/#index_header' % rr_url
     diffset_count = review_request.diffset_history.diffsets.count()
 
     if diffset_count < 1:
-        comment = 'Review commit: %s\nSee other reviews: %s' % (diff_url,
-                                                                rr_url)
+        # We don't need the first line, since it is also the attachment
+        # summary, which is displayed in the comment.
+        extended_commit_msg = review_request_draft.description.partition(
+            '\n')[2].lstrip('\n')
+
+        if extended_commit_msg:
+            extended_commit_msg += '\n\n'
+
+        comment = '%sReview commit: %s\nSee other reviews: %s' % (
+            extended_commit_msg,
+            diff_url,
+            rr_url
+        )
     else:
         comment = ('Review request updated; see interdiff: '
                    '%sdiff/%d-%d/\n' % (rr_url,
                                         diffset_count,
                                         diffset_count + 1))
 
     bugzilla.post_rb_url(bug_id,
                          review_request.id,