More Ultimate Edition 3.5 backported, upgraded, dist-upgrade, ununified...
Nautilus pops up everywhere and it sucks...there is an easy way around this....
Go to home-->.config-->xfce4-->helpers.rc
Open this with an editor...
Where it says FileManager=
You have 3 base choices that it will accept right away you can enter...
nautilus
pcmanfm
thunar
...and it will change accordingly..but what if you don't want those?
Go into the XFCE environment and make the GUI do it for you...
Go back in to the helpers.rc file and open it...
In the field where it says FileManager=, enter whatever..
Now go into your Launcher and choose File Manager, you will be greeted with a screen that looks like this(although less awesome and probably more centered)....
Click on that and it will give you an entry field, type the name of your preferred file manager...
Now choose that file manager...
Now when you are in this environment(XFCE) it will pull off of Dolphin but probably better to change to pcmanfm or thunar if you are always here, but what this will do is make it so when you are in KDE and open folders with Transmission or what have you, it will open Dolphin instead of Nautilus, and you should have some more consistency with your icon settings through this as well.