...to run different versions of Dojo side-by-side; this is accomplished through the addition of a variable called dojo._scopeArgs. Most of the time this is unnecessary, and it's pretty likely that what you're seeing is a side-effect from this:

http://dojotoolkit.org/book/book-dojo/part-3-javascript-programming-dojo...

Because the new versions of Firebug are in beta, I'd suggest that you simply ignore this particular line; but we should probably get in touch with the Firebug team and see if we can't figure out what the issue is (i.e. what are we doing or what are they doing to have this show in the console.)

Thanks ttrenka for the information.
After further investigation the issues seems specific to the built version of dojo 1.1.0.
I've posted a message with more details in the Firebug group, I suggest to continue the discussion there.