It appears that many of the millions of people who rely on Skype are having issues accessing the service this morning.
On its Twitter account, the company acknowledged an issue, tweeting: "Some of you may have problems signing in to Skype – we're investigating, and we're sorry for the disruption to your conversations."
Some of our staff are able to sign on, but are unable to see any of their contacts. Meanwhile, users are rapid fire tweeting about Skype's downtime.
Last month, Skype hit a new usage record, hosting 25 million people on its service concurrently, speaking to both the ubiquity of the service and the problem created when it goes down.
Let's just hope this doesn't rival the Skype outage of 2007, which saw the service down for an extended period of time.