A number of the entertainment service's members discovered over the Labor Day weekend that they could stream content from Netflix to only one device at a time. So if Dad was watching an action movie on his computer, Mom wouldn't be able to watch a romantic flick streamed to the in the living room.

Although explains that limitation , some users didn't run into the barrier until last weekend.

"Some membership plans allow you to watch simultaneously on more than one personal computer or Netflix-ready device," a Netflix FAQ explained. "If you are on the Unlimited Streaming plan, the Unlimited Streaming + 1 DVD out-at-a-time plan or a limited streaming plan, you may watch only one device at a time."

"If you are on the Unlimited Streaming + 2 DVDs out-at-a-time plan, you may watch on up to two devices at a time," . "Members on the Unlimited Streaming + 3 DVDs out-at-a-time plan may watch on up to three devices at a time. The maximum is four devices at a time—available for members on the Unlimited Streaming + 4-or greater DVDs out-at-a-time plan."

According to Stop the Cap!, a blog "dedicated to promoting better broadband, fighting data caps, usage-based billing and other Internet overcharging schemes," many of its readers told the publication that they have never had problems running two or even three concurrent streams at the same time on a “stream-only” plan until recently.