County Executive Scott Vanderhoef (R-Rockland) signed off on Rockland's revised 2012 spending plan late this afternoon.Under the budget, more than 500 layoffs originally proposed by the county executive were averted. The county-run Summit Park Nursing Home was also saved.However, the county portion of the residents' property tax bill will go up by 30 percent.Hundreds protest Rockland County's proposed budgetRockland Co. union leaders blast proposed budgetRockland residents upset with proposed 2012 budget cutsVanderhoef: Rockland finances a sinking ship