Cassandra 1.1.2 -> 1.1.8 upgrade

[Mike]

Hello,

We are looking to upgrade our Cassandra cluster from 1.1.2 -> 1.1.8 (or 
possibly 1.1.9 depending on timing).  It is my understanding that 
rolling upgrades of Cassandra is supported, so as we upgrade our 
cluster, we can do so one node at a time without experiencing downtime.

Has anyone had any gotchas recently that I should be aware of before 
performing this upgrade?

In order to upgrade, is the only thing that needs to change are the JAR 
files?  Can everything remain as-is?

Thanks,
-Mike