Revs leaking oil – need service?

I’ve only had my Revelations (2008 426 Air U-Turn) for about 9 months, but they seem to leak oil from the top of the legs. The bike’s mostly stored upside down in my small flat, but even so, the Rebas that they replaced didn’t leak anything.
Is this something I can fix, or is it just better to get them serviced and mention it to the bike shop?