I get this problem too. My only work around is to know the directiory before hand, and type the location in the loacation bar. (ie. /mnt/cdrom/) Obviously, this isn't very practical. And I had to do it all the time when I want to access samba files that I've mounted.
"Chopsticks require a person to use 64 muscles and 30 articulate movements simultaneously, which also acts in developing brain potential."