Comment 9 for bug 152296

For further clarification...

These are my statements from' DistUpgradeControler.py':

[...]
# My debug
logging.debug("Debug 1")

# ask the user if he wants to do the changes
res = self._view.confirmChanges(_("Do you want to start the upgrade?"),
                                        changes,
                                        self.cache.requiredDownload)

# My debug
logging.debug("Debug 2")
[...]

Result: Debug 1 appears in the log, Debug 2 doesnt. I traced the confirmChanges function with debug statements to the line of code mentioned in the comment above.

Hope this helps.