OO3b: Disable AutoURL detection?

[Nick Matsakis]

I'm trying to script OO3b4, inserting some URLs into cells.  I want OO to
treat the URL as plain text, but it instead automatically makes it a URL
attachment. When I run this:

tell application "OmniOutliner"
	set mycell to the second cell of the first row of the front document
	set the text of mycell to "http://www.omnigroup.com"
	return the text of mycell
end tell

I get some strange chararacter and not "http://www.omnigroup.com".  I can
use OO2 for the time being, but I think it would be good if OO3 didn't
think it knows better than me about what my data is.

Nick Matsakis