This weekend I applied the first update from FreeNAS. It is very easy to do. First you need to stop all services in the webinterface. Then, you download the apropiate patch and checksum from their website. After. In the advanced settings of the webinterface you upload the patch, copy and paste the checksum and apply the patch for update. You wait 10 min or less if you have a fast server. The secer will restart twice. After that, you re-enable you services and all is done. Very easy, it is the only thing I had to do, since I configured this server 3 months ago. It is working non- stop and flawless for me.