My wife and I are currently shopping for a stroller for our son (he's now just over 13 weeks old!). It's surprising that a lot of the strollers out there are not actually safe.
The latest one recalled is the B-Nimble Stroller manufactured by Britax Child Safety, Inc. The stroller may have brake failure (basically, the brake pedal will click when it's pressed, but it might not actually be locked). The recall is for about 20,000 units in the U.S. The U.S. Consumer Product Safety Commission information on the recall can be accessed here.