"Many physical changes to improve worker health and safety have been made since the investigation, including the enforcement of ergonomic breaks, changing the design of workers' equipment to guard against repetitive stress injuries, updating of maintenance policies to ensure equipment is working properly, and testing of emergency protective equipment like eyewashes and sprinklers," the updated report said. "Foxconn has also engaged consultants to provide health and safety training for all employees."

Foxconn in August raised salaries by more than 16% at its mammoth Zhengzhou factory making iPhones, a reduced the probation period for new workers there by 50%. It is not clear if these changes were made across its entire factory presence there or even at all its facilities making Apple products.

It at least appears that many of these changes had not found their way to the Taiyuan plant, which is smaller and under less scrutiny.

BusinessWeek reported that although general pay levels were on par with other Foxconn facilities, other conditions were not. Workers at the plant cite low quality food , dorm rooms with four bunk beds for eight people, and dirty shared bathrooms. That in addition to the discrepancies related to overtime pay, a constant complaint about labor conditions in Chinese factories generally.

Complaints about company security guards were also found at the Foxconn factory, as they are in many other companies in China.

A statement posted on the Internet by someone claiming to be a worker at the plant said that "Incidents in which guards beat up workers at Foxconn Taiyuan frequently occur, and the methods used are brutal."

"Factory workers anywhere, beyond Foxconn, never have a good word to say about security guards," said Geoffrey Crothall, a director at rights group China Labor Bulletin, after the Foxconn riot. "Their training is minimal, they're recruited en masse and the requirements are not much."

Louis Woo, a Foxconn spokesperson, said of these charges that "If there's any truth to these allegations, we'll take severe action against any security guards, even though we don't hire them directly," implying Foxconn contracts the work of recruitment of the guards to a services company.

On Wednesday, a Hong Kong–based newspaper called the Apple Daily wrote that Chinese reporters had snuck into the hospital that was housing injured Foxconn workers. It reported that some of the people there claimed that police attacked workers regardless of whether or not they were involved in the riots. The plant is running on a 24-hour work shift to provide spare iPhone 5 parts, Apple Daily said.

Other employees reported that their cellphones were confiscated by local police, who then deleted sensitive images and video of the riot. The Chinese government has been allegedly working hard to censor news of the riot in other ways, including the removal of related images from China's most popular blog, Sina Weibo.

Foxconn is the trading name of Hon Hai Precision Industry, the world's largest contract maker of electronics.

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