I've been banging my head against the wall for several days on this. I've viewed http://www.sencha.com/forum/showthre...h-parent-panel for the Ext Js library and verified that my accordion is the first child of a variable-height component. The layout works correctly after I resize the window, but not until then.
I've attached some screenshots demonstrating the behavior. The "Stuff" panel is expanded in both of them.