To allow class action defense lawyers anticipate claims against which they may have to defend, we provide weekly, unofficial summaries of the legal categories for 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. This report covers the time period from December 1 – December 7, 2006. Employment law class action cases yet again hold the top spot on the list. We include only those categories that include 10% or more of the class action filings during the relevant timeframe. Approximately 44 class action lawsuits were filed in these California state and federal courts during that time period, of which 16 involved labor law claims (36%). Antitrust class action filings came in a strong second, with 10 new lawsuits (23%). Class action lawsuits alleging unfair competition, including unfair business practices and false advertising claims, came in third with 9 new class action filings (20%).