LinuxQuestions.org - Fstab not mounting a subdir with the bind option

Hi there!
I've installed a stripped-down Debian on a 1 GB xD memory card. In order to outsource some disk space, I redirected the swap to the swap partition on the internal hard drive and tried to redirect my /home and /tmp directories likewise. When I boot up, however, my Debian mounts the new /home seamlessly, but won't accept the bind mount. This is a snippet from my fstab:

Code:

proc            /proc          proc    defaults        0      0

/dev/sdb1      /              ext3    defaults,errors=remount-ro 0      1

/dev/sda3      /home          ext3    defaults        0      2

/home/tmp        /tmp                ext3        defaults,bind        0        2

/dev/sda1      none            swap    sw              0      0

/dev/sdb1      /media/usb0    auto    rw,user,noauto  0      0

The line that doesn't get mounted is the fourth one (the /home/tmp one). I even tried editing it so /home/tmp will read /dev/sda3/tmp, but no go. (And yes, both the /tmp and the /dev/sda3/tmp directories exist). Anyone got a clue?
On another note: is it normal that an xD media card is so extreeemely slow?
Any input welcome.