This may be silly but... did you talk to the NPC again to get it in the first place? He doesn't give you the file the first time you speak to him if I remember correctly.
Yes i have at least 3 times already. His dialog box reminds you to deliver his file, and your left with 2 options. "I Will" or "Read me the poem again?"
Did you try to re-start the Gaebolg quest ? As for the agent I was never able to talk to him again, all what I remember while doing the quest is a pop up appeared when I ported into him and then he disappeared promptly. The quest was able to be finished correctly however [this was during pre-renewal].
I went to the quest knight and asked her to delete my quests. Then tried to talk to "Busy Boy" and he is not responding. When i try to talk to "Historian Rodafrian" in morroc, a blue dialog screen appears saying "It appears you have lost your files"
And yes i've done this quest successfully on 4 other characters, pre renewal, and if i remember right the GMs recently stopped NPCs from 'unhiding' to prevent them from bugging up. I remember the "Agent" npc had a history of bugging up pre renewal.
Edited by Cubical, 29 May 2011 - 12:47 PM.