Comment 29 for bug 1170647

I'm using 13.10. It seems to be somewhat related to this: http://askubuntu.com/q/235805/38137

If you click on the Hard Drive launcher icon, a folder window appears but the indicators show that it is a file window. If you then minimize this window, it appears to go to the "Files" launcher, but actually the correct way to restore it is to click on the Hard Drive launcher icon again.

This is ok (ok, perhaps a little confusing for the user - the indicator should really point to the Hard Drive launcher not the Files launcher when such a window is open) provided that the hard drive icon remains docked to the launcher. The real problem comes when you undock the Hard Drive/Partition's icon from the launcher - then you have the same behaviour with no reasonable alternative.

I hope this explanation makes sense.