So I just went through the same thing. I eventually plugged some commands into a terminal window for the Ubuntu tutorial and got it up and running. I find the software center a tad flacky. I tried the ignore command as well but I had to use the Steps 1 and Steps 3 of the post
http://forum.subsonic.org/forum/viewtopic.php?t=1486 to complete the install. I made sure that my java was correct and then started Subsonic in a command line. A few reboots and it is up and running. I can't seem to make it find my music however. so .....