I have a ext4 partition labeled "mdpf", and I set the  mounting point for it
at the setup time.
The mount point I set for it is /home/pswz-zhangy/mdpf (ps:pswz-zhangy is my
username)
And everytime I log in the first time I want to enter the partition, I have
to
do:
1.single or double click on the icon on desktop or the folder in /home/pswz-
zhangy
and this action will have no response.
2. double click on it again to enter it.

after the first time I open the folder, everytime afterward will be normal
(only  one time double click will open it) until my next login.

I have noticed this same behaviour, and dug a bit further:

When set to the default open-on-double-click behaviour, Nautilus ignores
the first attempt to open any mounted location via a double click on its
icon, either on the desktop or on a browser window, even if the location
was already opened via the Places menu: the the browser does not open
(when on the desktop) or changes to the location (when on a browser
window).

This regards fstab locations ('/' being the exception) and automounted
drives, and does not happen when in open-on-single-click mode, or with
regular files and folders.

Oddly enough, if I log out of the Gnome session and return, it won't
repeat the miss: a reboot is needed to replicate the behaviour.

I'm using a properly updated installation of Debian squeeze (6.0.1,
"Linux version 2.6.32-5-amd64 (Debian 2.6.32-34) (dannf@debian.org) (gcc
version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Wed May 4 22:04:54 UTC 2011").

Best regards
Pedro Palmeiro

Hey,

this is an old bug.

Could you please still reproduce this issue with newer nautilus version
like 3.4.2-1+build1 or 3.8.2-3 ?

thanks
regards
Pedro