QUOTE (bonehead @ Aug 8 2013, 04:21 PM)
Would a background count impose its dice pool penalty on Improved Attribute, Improved Reflexes, Adrenal Boost, or Attribute Boost?
For any power that Boosts or Increases a skill or an attribute, either permanently or temporarily, any dice pool based on that magically boosted skill or attribute gets a penalty. This includes boosts through spells and foci.
For Improved Reflexes, this would specifically apply to any Reaction based dice pools, since your Reaction is enhanced.
However, for the moment (And this may change when the official errata is released), since Initiative is not a Dice Pool, it is not effected by the penalty.
Any tests to "cast" or "activate" the ability (Such as with Attribute Boost) would be affected, as are any drain tests.
Plus keep in mind, penalty or not, if you end up in a Void or Flux (BGC 13+), you WILL take damage each turn if you have any magical effect active.