New Nautilus version 3.6 (coming with Gnome 3.6 / Ubuntu 12.10) is showing annoying text tips on the bottom right/left edge as a new feature.
Is there a way to disable it?
No, there is no way to remove the tip in the bottom left/right edges when you select a file or folder showing it's information.
This has been called floating status bar and the gnome developers wants to remove the old status bar also!! The old status bar is still available in 12.10. If you select from menu → View → Status bar, the old status bar will be activated and you will get rid of the new floating status bar. You can use this as a workaround.
There is a recent commit in nautilus source to remove the old status bar completely. The commit can be seen here. The main line of importance there is this two one:
If you don't want this feature, I would suggest you to compile the nautilus yourself.
Im using 10.10 . this should be similar to 12.04