The issue was brought up on Skype’s forums, when a flood of users started reporting that private message had arrived with other contacts.
Skype have since admitted the fault, and said that in “rare circumstances” a private message between two users can be also sent to a third party.
The glitch, which started appearing following a software update in June, has caused many users to say that they will stop using the service.
Skype are currently working on a patch for the problem, and hopes to put out an update in the “next few days”. The update will automatically prompt users to download it in an attempt to stop the problem from spreading further.
Skype, which is now owned by Microsoft, allows users to call each other over the net rather than through more conventional means. The service had dragged in a great number of costumers, both individuals and businesses.
This isn’t the first update related issue for Skype. Back in May 2011, the whole service was taken offline for an extended period following a dodgy update.