When using BorderLayout, the south region when made expandable is broken when showing the preview pane... ie the click the bar and show the region temp like.... probably best checking the north region as well as it may also have this bug.
bump - Darrell, this bug still exists and with recent changes to margins, looks like the collapsible nature is broken too... it now hides way, way too low !!
...uhm, forgive me English is no good too much ;-)
Does this mean, that actually the north and south region are not supposed to be expandable any more?