Already posted this in the March FAQ thread, but in case it is found here first...
Could you clarify when the retcon of a Quality applies to a character, is it applied as if the character had it at character creation? Or is this just allowing the character to obtain a quality without paying the extra karma?
I ask because some qualities (Like Black Market Pipeline or Sensei) need to be applied to an appropriate contact, which people may have chosen different contacts for their character had these qualities been available.
The second reason I ask is there are qualities that alter character creation and development, such as College Education or School of Hard Knocks, which may change how you spend knowledge skill points during character creation as well as possibly change the karma cost of future knowledge skills, which in turn could change how much available karma a character currently has.
This isn't going to have long term effects, since Run Faster character edits need to be done basically between now and the next time you play, so I'm not going to include it (at this time) in the next FAQ update.
Basically, apply as if you had it at chargen. However, you cannot rebuild your character. So you can add to existing skills (or buy new ones), or add to existing contacts (But not replace old contacts). If something provides a discount that you would have gotten on a skill or attribute or whatever you raised, the karma is refunded (and likewise, if it increases the cost, you go into Karmic debt).
Basically, fix the character so it's legal with as few changes as possible.