Currently SourceForge seems to have problems in delivering any mailing list posts. Other projects besides qooxdoo seem to be affected as well. We hope, that they fix the problems soon.
I’ve just registered and configured a new mailing list, which is used to monitor the bug activity. Bugs in qooxdoo are also used to manage feature additions and enhancement wishes.
You can register yourself to always stay up-to-date with the further development of qooxdoo.