Facebook says it is investigating a mother's complaints about a post that misused photos showing her child with a severe case of chickenpox.
The number of human interventions in journeys made by driverless cars from Google company Waymo in California more than halved in 2016.
There were only 124 "disengagement" incidents last year, where a driver had to take control of a test vehicle on public roads, down from 341 in 2015.
The cars drove nearly 636,000 miles last year, compared with just over 424,000 in 2015.
Other states in the US do not require such reporting.
The California Department of Motor Vehicles published the annual reports on Wednesday.
"Disengagements are a natural part of the testing process that allow our engineers to expand the software' s capabilities and identify areas of improvement," Waymo said in its report.
The most common reasons for interventions in Waymo cars were "software discrepancies, unwanted manoeuvres of the vehicle and perception discrepancies", according to the company.
Of the 124 incidents, only 10 were caused by the "reckless" behaviour of another road user.
Beyond Waymo's impressive results, the news was generally good.
Cruise, the start-up leading General Motors' autonomous driving development, upped its testing in San Francisco markedly. It went from driving fewer than five miles in June 2015, to nearly 400 in June 2016.
It reported 414 disengagements in almost 10,000 miles of driving in 2016 overall.
For some companies the records show a very small amount of mileage covered by the autonomous cars.
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In other US states with self-driving regulations - including Nevada, Michigan, and Florida - there is no requirement for public disclosure of this type of data, which is why, for example, not much is known about Uber's autonomous vehicle testing.
Ford only reported 590 miles driven in 2016, all in the month of March. It only has two autonomous cars in California, but has a much larger fleet in Michigan, where reporting is not required.
Meanwhile BMW recorded one disengagement in its 638 miles of autonomous driving in March and April 2016, because lane markings on Highway 101 were not clear enough. The operator's reaction time
Source: BBC
Source: BBC
Google has confirmed it has closed its internet drone project Titan, three years after it bought the business.
The drones were designed to bring the internet to remote rural areas, complementing its Loon project - a similar initiative using hot air balloons.
However, the solar-powered vehicles have faced technical difficulties and funding challenges.
On Wednesday, blog 9to5 Google revealed Titan had actually shut in early 2016.
A statement from X, the Google division responsible for Titan, confirmed the news.
"Titan was brought into X in late 2015. We ended our exploration of high altitude unmanned aerial vehicles for internet access shortly after," it said.
"By comparison, at this stage the economics and technical feasibility of Project Loon present a much more promising way to connect rural and remote parts of the world."
Google acquired Titan Aerospace in 2014, reportedly fending off a bid from Facebook, which has also been trialling internet-providing drones.
Image copyrightGETTY IMAGES
At the time Google said it was "early days", but that "atmospheric satellites could help bring internet access to millions of people, and help solve other problems, including disaster relief and environmental damage like deforestation".
However, after test flights began in 2015, reports alleged that Titan was facing technical difficulties and was running out of money.
In mid-2015, the Titan team also experienced a crash in the Arizona desert which was later linked to a wing fault.
The statement added that "many" Titan staff had been reassigned to different parts of the business, including Project Loon and Wing, a division dedicated to providing drone-based deliveries.
Facebook's internet drones have also faced problems.
The firm's Aquila drone crashed during a test flight in June, prompting an investigation by the National Transportation Safety Board, and an explosion destroyed one of its satellites earlier in 2016.