Users report experiencing several-hour blackouts on the social network after sectarian riots left two people dead and 14 injured. Facebook says it can't find any technical issues on its end.
"Something went wrong," a message on the social network told would-be visitors. "We resolved the issue quickly," the company says.
The problem with the subscription service, which blocked updates, purchases, and in some case use of Adobe's software, is fixed, and Adobe apologizes.
After 24 hours of trouble with its subscription plan, including people being locked out of software, Adobe says it's fixing it.
Virgin Mobile has been forced to apologise to its customers after a network outage knocked out its voice, data and SMS services.
A site that houses more than 1.4 million bitcoin wallets has been down for more than 16 hours, but says users still have control over their virtual money.
After Google chat services go down for many users for about three hours, some find they actually have to talk to people in person.
Outages have been a persistent problem for the messaging app, but the latest was one of the longest and biggest, says the company's founder.
It's happened before, apparently, but the timing of this outage is notable, following as it does on Facebook's staggering-sum purchase of the messaging app.
Yahoo's blogging network said it had trouble with "intermittent errors" for several hours.