Comment 24 for bug 817383

I agree with Thorsten. However you don't need to do that; in Precise 12.04 - gksu nautilus works for me. And no, I didn't try any of the workarounds mentioned in this bug report.

$ locate libnautilus-gksu.so

is nowhere to be found.

:/usr/lib/nautilus$ ls -al
total 60
drwxr-xr-x 3 root root 4096 Apr 9 16:09 .
drwxr-xr-x 197 root root 36864 Apr 14 10:57 ..
drwxr-xr-x 2 root root 4096 Apr 14 11:10 extensions-3.0
-rwxr-xr-x 1 root root 13996 Apr 5 08:52 nautilus-convert-metadata

gksu-polkit is not installed.

Interesting twist: when nautilus-open-terminal is installed the results of 'gksu nautilus' use that extension:
$ gksu nautilus
Initializing nautilus-open-terminal extension
Shutting down nautilus-open-terminal extension

$ ls -al /usr/lib/nautilus/extensions-3.0
total 552
drwxr-xr-x 2 root root 4096 Apr 14 11:29 .
drwxr-xr-x 3 root root 4096 Apr 9 16:09 ..
-rw-r--r-- 1 root root 34636 Apr 10 18:49 libdeja-dup.so
-rw-r--r-- 1 root root 13592 Mar 26 18:32 libevince-properties-page.so
-rw-r--r-- 1 root root 26240 Dec 10 06:15 libnautilus-actions-menu.so
-rw-r--r-- 1 root root 17964 Dec 10 06:15 libnautilus-actions-tracker.so
-rw-r--r-- 1 root root 34808 Apr 10 16:53 libnautilus-brasero-extension.so
-rw-r--r-- 1 root root 13780 Mar 26 18:23 libnautilus-fileroller.so
-rw-r--r-- 1 root root 17996 Dec 10 07:08 libnautilus-open-terminal.so
-rw-r--r-- 1 root root 9636 Apr 5 08:52 libnautilus-sendto.so
-rw-r--r-- 1 root root 42872 Dec 12 00:26 libnautilus-share.so
-rw-r--r-- 1 root root 63872 Apr 11 12:16 libnautilus-ubuntuone.so
-rw-r--r-- 1 root root 42252 Jan 8 19:24 libnautilus-wipe.so
-rw-r--r-- 1 root root 210196 Mar 29 00:13 libtotem-properties-page.so

when 'nautilus-open-terminal extension' not installed 'gksu nautilus' runs & works as usual.