As a resource to California class action defense attorneys, we provide weekly, unofficial summaries of the legal categories for new class action lawsuits 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. This report covers the time period from September 10 – 16, 2010, during which time an unusually high number of new class actions — 64 — were filed in these California state and federal courts. While labor law class actions often account for more than half of all new class actions filed in these courts, this has not been true of late. This past week, however, labor law class action filings returned with a vengeance. During this reporting period, 42 new labor law class actions were filed, representing a remarkable 66% of the total number of new class actions filed. No other category managed to break the 10% threshold this past week.