I finally discovered why my lattes sometimes feel a bit light.

Yes, I do drink lattes.

A federal judge in San Francisco has given the green light to a fraud and false advertising lawsuit against Starbucks, in which to customers say the company systematically under-fills its beverages, often by as much as 25 percent.

The foam on Starbuck’s lattes, plaintiffs say, displaces actual milk and thus consumers are denied their proper portions of tall, grande and venti drinks.

Gotta say, I’ve got some sympathy.