Hey Kirk,
Operator error perhaps. :)
This seems to happen a fair amount when people disconnect from their multi-monitor setup.
Search the list for "window stuck", and you'll discover that you're not the first to be bedeviled.
I started to suggest 'Zoom', but it seems to have been removed from the window menu. (I think I knew that already but forgot.)
The easiest fix is to put a couple of Applescripts in your script menu and give them keyboard shortcuts.
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tell application "BBEdit"
set position of front window to {0, 44}
end tell
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tell application "BBEdit"
set position of every window to {0, 44}
end tell
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** I've posted quite a bit about positioning and resizing windows with Applescript.
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Best Regards,
Chris