Hi,
When a programmatically created tab container is placed within an expando (also created programmatically), it takes it's size from it's containing component - the expando pane. Now - if the expando is collapsed, the tab container will retain it's original size and will not resize to the available real-estate exposed by the expando. Note that a content pane will resize correctly, but the tab container does not. Also, note that the tab container's width and height are based off percentages and not static pixel definitions.
