In order to assist California class action defense attorneys in anticipating the claims against which they may have to defend, we provide weekly, unofficial summaries of the legal categories for new class actions filed in California state and federal courts in the Los Angeles, San Francisco, San Jose, Sacramento, San Diego, San Mateo, Oakland/Alameda and Orange County areas. We include only those categories that include 10% or more of the class action filings during the relevant timeframe. Labor law class action cases generally top the list, and this past week was no exception. This report covers the time period from April 5 – April 12, 2007, during which time approximately 42 class action lawsuits were filed in these California state and federal courts. New labor law class action filings accounted for 45% of these cases, with 19 new class action lawsuits. The only other category exceeding the 10% threshold involved unfair competition law (UCL) class action claims, which include false advertising class action cases, with 7 new cases (17%).