[URL="http://dl.dropbox.com/u/5773554/.Civ5Save_%28ACHIEVEMENTS%29![]()
10 barbarian naval units have been converted (Suleiman specific achievement: Barbary Pirate - however I don't know if this will trigger for you. Maybe it will trigger only if another (11th unit is converted which could be achieved by just playing some turns, as I've placed a few destroyers next to barbarian camps which occasionally spawn a naval unit which you'll convert 50% of the time automatically... worth a try I guess. Don't even know if it actually requires you to have 10 alive in the same game or just convert 10 in total over the course of any amount of playthroughs. Please post if this worked for you (maybe even on the first turn without any extra conversions?))
It does not trigger. It goes by what's already logged for you in any previous games playing Suleiman. I had played him once before and had captured 7 barbarian ships. I waited until one popped and converted and did not get the achievement. When I checked my log files it had incremented barbarians captured to 8. It's a total number of play throughs so you do not have to keep them alive. I'm not sure what would happen if you captured one then promoted it but I suspect since it increments the counter on capture you should be fine.