Making a ListCellRenderer containing a word-wrapping JTextArea is apparently asking for trouble. The root of the problem is that there isn't a specified protocol for the negotiation between container and contained gui components to establish size. What you want here is for the JList to compute its width independent of the JTextAreas in the cells. The JTextAreas get their width from the JList and wrap appropriately. Finally, the JTextAreas now know their heights, so the JList can compute its height.
To laugh at my suffering see these forum threads:
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