They're just testing the latest version by releasing it to a small number of users.
BT's support centre had not been told, but later said there was "an issue" affecting "a small number of users".
Maybe a small number of users receive large volumes of abuse which skews our understanding of how prevalent this is.
Tencent blamed a technical glitch when it admitted that a small number of users outside China had experienced problems.
"It isn't really economically feasible for a traditional phone company to build fiber optic for a relatively small number of users," he said.
In a statement on Wednesday, Apple confirmed a "brief issue with the software update process affecting a small number of users during the first hour of availability".
An Apple spokesperson said: "We experienced a brief issue with the software update process, affecting a small number of users during the first hour of availability.
Facebook's official response is below: A small number of users raised concerns after what they mistakenly believed to be private messages appeared on their Timeline.
Apple has not yet responded to media requests for comment, but this problem only seems to be affecting a small number of users.
"We've identified an issue where a small number of users were experiencing a problem with questionable website pop-ups in their default browsers as a result of an isolated issue with an ad on our Free tier.
A Facebook spokesperson later said that an investigation was launched after "a small number" of users raised concerns after what they believed to be private messages appeared on their timelines.
