According to California state law, same-sex married couples have the same rights as do opposite-sex married couples. This includes same-sex couples that were legally married in California in 2008 before Proposition 8 was enacted, as well as same-sex couples that were married in other jurisdictions. Moreover, parties to a California registered domestic partnership also have the same rights and responsibilities as a legally married couple. This includes parties to an out-of-state "comprehensive" domestic partnership (such as those in Nevada, Oregon and Washington state).
Whatever controversy persists concerning California's Proposition 8 relates solely to right of same-sex couples to legally marry in California. California statutes have all been amended to provide the same rights and responsibilities to same-sex couples even if they cannot legally marry in California.