It seems that we can popup a JOptionPane from a background thread in a SwingWorker without the sky falling in. "But why?"

Ps. The title of this series, "Invetigation in process" comes from an episode of The Office when "Gareth Keenan Investigates!" but mispels "investigate" on his makeshift sign which for his "office." Heh heh. Hee hee. He He. Hmm.