Long list of notices on site verify

When I verify a site in my aegir, I get a long list of notices in the task report:

Undefined property: stdClass::$task_args hosting_task.module:572
Undefined property: stdClass::$revision hosting_site.nodeapi.inc:168
Undefined property: stdClass::$revision hosting_alias.module:157
Undefined property: stdClass::$revision hosting_site.nodeapi.inc:168
Undefined property: stdClass::$revision hosting_alias.module:157
Undefined index: info hosting_package.module:373
Undefined index: info hosting_package.module:389
Undefined variable: pacakge hosting_package.module:390
Trying to get property of non-object hosting_package.module:390
Undefined index: info hosting_package.module:390
Undefined variable: pacakge hosting_package.module:390

The list is about 900 lines long.
I tried using this technique: http://www.lullabot.com/articles/quick-and-dirty-debugging on the hostmaster site to get some debugging info, but nothing shows up along with the error messages.
What way would be the recommended to get a backtrace of this?