PostgreSQL 9.0.3 on RHEL 5.6?

Is PostgreSQL 9.0.x certified to run on RHEL 5.6?  My platform is x86_64.  I am installing from source, not the one-click installer at this time.

I appologize if this is a silly question in the world of PostgreSQL.  I am predominately an Oracle guy, and as such I am used to waiting for the vendor to certify their product on every release of the operating system.  I am not sure how this works with open source databases like PostgreSQL.  I have read through the release notes and I don't see anything like a max supported version of the operating system.

Thanks in advance,

-Mark