Skype has acknowledged a bug that is affecting users in pretty much the most horrifying way possible. Instant messages sent over Skype are being sent to random contacts—even contacts you've never connected with before.
Here's Skype's official statement on the matter:
"We are aware that in rare circumstances IM's between two contacts could be sent to an unintended third contact. We are rolling out a fix for this issue in the next few days and will notify our users to download an updated version of Skype."
Now, we totally expect Skype to figure this mess out. But this is really, really troubling. This might be overly reductive, but there are just a few main reasons to have someone in your Skype contact list: Work-related contacts, long-distance family contacts, and sexytime partners. You don't want any kind of overlap in that Venn diagram, at all, ever—especially not at random.