[otrs] pgsql 8.4 and reply-to

Actually they are two different questions: 1- Has anyone got OTRS running with Postgres 8.4? I have it with 8.3 and it's working great but there are these new windowing functions in pgsql 8.4 that would help me a lot to build some reports and I kinda would like to upgrade. Before trying it out in my test server, thought it would be a good idea to ask. 2- Is there a way to set a reply-to address (a different one from the one the sender) as the system address in the queues? I couldn't find an easy option to do so. TIA, Mariano