Are Naomi Watts and Liev Schreiber on the Rocks?

The Daily News reports that Liev Schreiber has been overheard complaining of girlfriend trouble while his lady friend Naomi Watts has been telling people to keep an eye out for new boyfriends. In the past, Liev has been linked to Sex and the City's Kristin Davis while Naomi and fellow Aussie Heath Ledger were on the break up and make up track for quite a while there. Could this new romance already be on the way out?