Hello all. Don't know if anyone else suffers from this in Aurora, there are no posts here about it. Seems to affect a select few in various Linux flavors. Nautilus seems to work just fine in sudo mode, it just spews forth 3 or 4 gtk-WARNINGS whenever I use it. If I close the window, open a new terminal and try it again while permissions are in effect, no warnings come. Just annoying, everything else is working great, so decided to fix it.
So after a week or so of occasional searching on the subject, to no avail, came upon this thread at the Ubuntu forums: http://ubuntuforums.org/showthread.php?t=1503801&page=1
Tried all those remedies, they didn't help. But they did put me on the right path. In my ~/.nautilus/metadata folder is a file that states "Nautilus 2.32 deprecated this directory and tried migrating this configuration to ~/.config/nautilus." And indeed, there is a Nautilus/metadata folder in ~/.config with the configurations.
When I tried creating a /root/.config/Nautilus folder as suggested in that thread, I found that the folder was already in existence. BUT there was nothing in the folder. I copied the metadata folder from ~/.config/Nautilus folder to the /root/.config/Nautilus folder and voila! No more warnings.
Perhaps the last chapter in the ongoing quest of an error free EB4 beta installation.

Well, it worked for a few hours. Then, doing some other things, I rebooted a few times and now the WARNINGs are back! At 1st, the new directories were deleted(?) from root, restored them and after rebooting they are still there. But the WARNINGs continue. Sorry for the apparent misinformation.

Edit: Well, it does seem to fix it "most of the time", however, I have solved the problem with the information from this page: http://www.psychocats.net/ubuntu/graphicalsudo