Hi all.
I have ubuntu 10.10 and it offer me to update cassandra today. And I did it. As I can see it update it to cassandra 0.8-beta1. Due to some jars missed cassandra wan't start.
I already downgraded.

Some details:
root@asus:~# apt-cache policy cassandra
  Installed: 0.7.4
  Candidate: 0.8.0~beta1
  Version table:
     0.8.0~beta1 0
        500 http://www.apache.org/dist/cassandra/debian/ unstable/main i386 Packages
 *** 0.7.4 0
        500 http://debian.riptano.com/maverick/ maverick/main i386 Packages
        100 /var/lib/dpkg/status

root@asus:~# apt-cache policy sun-java6-jdk
  Installed: 6.24-1build0.10.10.1
  Candidate: 6.24-1build0.10.10.1
  Version table:
 *** 6.24-1build0.10.10.1 0
        500 http://archive.canonical.com/ubuntu/ maverick/partner i386 Packages
        100 /var/lib/dpkg/status