diff --git a/offlineimap/ui/UIBase.py b/offlineimap/ui/UIBase.py
index 2c30b94..8558421 100644
--- a/offlineimap/ui/UIBase.py
+++ b/offlineimap/ui/UIBase.py
@@ -124,6 +124,11 @@ class UIBase(object):
         of the sync run when offlineiamp exits. It is recommended to
         always pass in exceptions if possible, so we can give the user
         the best debugging info.
+        
+        We are always pushing tracebacks to the exception queue to
+        make them to be output at the end of the run to allow users
+        pass sensible diagnostics to the developers or to solve
+        problems by themselves.
 
         One example of such a call might be:
 
@@ -135,13 +140,14 @@ class UIBase(object):
         else:
             self._msg("ERROR: %s" % (exc))
 
+        instant_traceback = exc_traceback
         if not self.debuglist:
             # only output tracebacks in debug mode
-            exc_traceback = None
+            instant_traceback = None
         # push exc on the queue for later output
         self.exc_queue.put((msg, exc, exc_traceback))
-        if exc_traceback:
-            self._msg(traceback.format_tb(exc_traceback))
+        if instant_traceback:
+            self._msg(traceback.format_tb(instant_traceback))
 
     def registerthread(self, account):
         """Register current thread as being associated with an account name"""