Despite historically low mortgage rates, tough underwriting standards and mortgage hassles are continuing to drive homebuyers towards all cash transactions in 2012. According to new numbers released this week from the Campbell/Inside Mortgage Finance HousingPulse Tracking Survey, cash transactions accounted for a record-high 34.1 percent of home purchases tracked in January. That was up from 29.4 percent a year ago and just 22.8 percent in January of 2010, based on a three-month moving average. Importantly, the large share of home purchases funded with cash instead of mortgages highlights a serious problem...