That "iota" thing again, still

http://www.boston.com/news/local/massachusetts/articles/2005/12/31/new_orthodox_bishop_sets_his_goals/?rss_id=Boston+Globe+--+City%2FRegion+News

Q: As 2006 dawns, are Christians closer to unity or further away from it?

A: The churches are separated doctrinally. The major difference was the Nicene Creed, [which] as established stated that we believe in the Holy Spirit, who proceeds from the Father. A change came in, from our point of view from the influence of Charlemagne, when the creed stated that the Holy Spirit proceeded ''from the Father and the Son," [because for Orthodox Christians] the Spirit proceeding from the Son technically would take away Christ's humanity.

Holy Spirit help us.