What's with the number in a red circle above the Facetime icon in the dock?

Settings > Notifications > FaceTime > Badge App Icon OFF.

I have that problem also. How to get of the red circle with the number?

When all call are deleted it still remains.

It means you have an invitation to an event !!! Click on the envelope to get a choice of what to do.

I'm interested in this too, kongakut2012. I can't see an envelope either. I discovered that the number probably meant that I had a missed call, but when I cleared all recent calls (including the missed one) the number didn't go away. So -- where's the envelope, please???

The flag on the FaceTime app is the number of missed calls.

Do a hard reset. That red circle was driving me nuts too! That fixed it for me, after checking every darn button on Facetime and having no luck.

I am running Lion still... I right clicked and did 'show recents'... and it went away.....

Under Lion and Mountain Lion. there's a RECENTS button in the bottom right corner of Facetime main window. Click it, then there's a list of recents (similar to iOS) and a Clear button.

Try opening FaceTime and tick the "Calls from Phone" box, then untick it.

I had it stuck on 1 notification and this fixed it as it must have synced with my phone again.

Thank you. GSP in Oregon