qooxdoo 0.8.1 is quite a comprehensive release, with a lot of bugs fixed, but also some useful new features added. It is recommended as an upgrade for existing 0.8-based applications, and also for new users getting started with qooxdoo.
allowShrinkY by default to false in Label.rich property in ToolTip for rich text tooltips.ComboBox to allow for HTML entities in the List items.center() method: If the window was larger than the view, the title is moved out the view, so it wasn't possible to close the window.
The rest of the Tooling section is about the Generator:
= prefix