If an opponent takes control of one of my characters, what happens to the attachments on that character? Are they discarded?Or do they stay attached to that character, but I retain control over them? Certainly an effect that let's you "take control of [a/that] character" does not extend to attachments on that character, does it?

Attachments remain attached to that character (unless the restrictions are not met anymore, in which case they are discarded) and you control them still.

eloooooooi said:

Thank you for clearing that up for me.

I have a similar question:

Who controls the attachments on my character, if they were put there by someone else?

Actual Situation Core Baratheon/Targaryen/Lannister:

My 'Jamie Lannister' was intoxicated by 'poisoned wine' and I as the main English speaking player and owner of the game said that Targ_player must kneel influence to change the attachments target. The others thought otherwise.

Baratheon player than stole Targ players influence location and I had to team up with targ to give her back her location an rid me of the wine.

By the time we got things sorted out Baratheon was at about 10 power.

If I hadn't insisted on Targ controling the attachment things might well have gone differently: so who's right, me or my players ?

Generally speaking, the player who played or put into play a card (the one who had the card in his or her deck) is the owner of the card. The owner is also the controller of the card unless an effect especifically says so (i.e. core set Honor Guards). The controller of the card may activate the triggered effects on that card.

In this case, the Targaryen player controls Poisoned Wine (since he's the owner and the card didn't change control) and can activate its triggered effect if he has the necessary influence.