Comment 1 for bug 1189225

I was able to confirm this issue on a Pi 1B with 512MB RAM.

It did however install the version from the raspberrypi.org repo which can be explained by looking at the output of 'apt-cache policy jackd2':
diederik@rasppi-1b:~$ apt-cache policy jackd2
jackd2:
  Installed: 1.9.8~dfsg.4+20120529git007cdc37-5+rpi2
  Candidate: 1.9.8~dfsg.4+20120529git007cdc37-5+rpi2
  Version table:
 *** 1.9.8~dfsg.4+20120529git007cdc37-5+rpi2 0
        500 http://archive.raspberrypi.org/debian/ wheezy/main armhf Packages
        100 /var/lib/dpkg/status
     1.9.8~dfsg.4+20120529git007cdc37-5 0
        500 http://mirrordirector.raspbian.org/raspbian/ wheezy/main armhf Packages