Paint.NET 3.30 Beta 2

* Changed: Most effects and adjustments, including plugins that use IndirectUI, have been visually refreshed. The new look is cleaner and more compact. These changes are shown in more detail at http://blog.getpaint.net/2008/03/10/cleaning-up-the-ui-for-paintnet-v330/
* Fixed: Thumbnails for PDN images now include transparency, which improves their appearance in Windows Vista.
* New: For developers, added a Color Wheel control to IndirectUI for use in effect plugins.
* New: For developers, added ability to customize certain properties of the effect configuration dialog via IndirectUI.