[sblock=Haunted]
I'd like to define Haunted little more fully then just 'appears at inopportune times' text.
I realize it's fully in your domain to say when and how ghost appears, but maybe little more formalization is in order. Read and think it over.
Normal skill affecting flaws always give -5 to skill, but affect only one skill. I'm thinking that not always ghost appearance will be disruptive. Let's say he only moans once and I need to roll Spot check for Berrek. He made his appearance, but not in a manner that will be disruptive. Same thing changes if I need to make Listen check or if he instead of moan materializes in front of Berrek. Same for hide or move silently.
So, my suggestion is this. First, lower penalty to -3, it affects almost all major skills of Berrek. When you decide that he needs appearance roll d8 (or choose one):
1 no effect, appearance is so subtle that only Berrek notices anything
2 moan or other sound effect, affects Move Silently
3 appearance outside of hideout, affects Hide in Shadows
4 subdued moaning or whispering in Berrek's ear, affects Listen
5 manifesting in front of Berreks face or otherwise inhibiting vision, affects Spot
6 fast movement, agitated whispering, small cantrip effects (as prestidigitation), affects Search checks or in physicaly focused situation, affects Tumble/Balance
7 inappropriate appearnce in social situation, affects Gather info, Diplomacy or Bluff
8 roll again, strong manifestation, penalty -5 OR manifest strongly enough to trigger other flaw (Ghost warped) affecting Berrek directly
[/sblock]