You can now download the July Community Tech Preview of Atlas here. Some Details:
UpdatePanel and ScriptManager:
- ScriptManager.RegisterControl() takes optional parameter to specify client type to create.
- Fix for UpdatePanels in Firefox.
Drag and Drop:
- Added public dragStart/dragEnd events to DragDropManager.
- dragStart fires with dragMode, dataType, and data as eventArgs.
- dragStop fires with empty eventArgs.
- style.position of dragVisuals will no longer default to “absolute”.
- DragDropManager do longers disposes dropTargets when unregistering them.
- FloatingBehavior now unregisters itself on dispose.