Barbarians spawning when they shouldn't?

[mrwho]

Is anyone else experiencing barbarians randomly spawning in friendly territory, when they clearly can't. I'm only at -4 unhappiness, but now twice in a row a barb has just appeared from nowhere in my territory, obviously where I have LoS.

Before:
http://imageshack.us/photo/my-images/541/0l3i.png/
After:
http://imageshack.us/photo/my-images/844/dkk5.png/

Notice the effects around the Barb spearmen, showing it didn't just move from the fog of war (I've had other instances where this is impossible).

I'd put in into the bugs section but I want to see if I've missed anything first, and to see who else has this problem.

These random barb spawns only ever seem to happen adjacent to a preexisting barb, almost like the game thinks it's a barb camp. I've just uploaded a second save directly before the incident.

 

[Doc Skillz]

I have had this happen on KING difficulty and with low unhappiness as well. I know that at 10 unhappiness "rebels" will spawn inside your borders, but I have indeed had a game where barbarians were spawning inside my territory, next to my capitol and seemed as if they had teleported there. I checked for barbarian camps in my area and there were none.

I had to exit the game...

 

[Maximo the Xth]

Barbarians pillaging a trade route by just standing on a tile and waiting for the trade unit to cross it will get another unit.
I'm not sure whether this is the way it should be working but it's pretty annoying, that's true.

 

[mrwho]

Barbarians pillaging a trade route by just standing on a tile and waiting for the trade unit to cross it will get another unit.
I'm not sure whether this is the way it should be working but it's pretty annoying, that's true.

That must be it. That SUCKS. As if barbs aren't annoying enough, now that they heal when pillaging... I hope they change this.