With home values in free fall in many places, it might follow logically that property taxes would go down as well. Not so in San Diego County. The county assessor's office predicts that property taxes will increase this year for 75 percent of homes and other properties. That would produce a projected $91 million in additional revenue to the county, cities, school districts and other jurisdictions. “We don't have a choice,” said Jeff Olson, chief of county property assessment services. The mandate comes from Proposition 13, the 1978 tax-limitation measure, and subsequent regulations. The state initiative, passed when skyrocketing inflation...