Four years ago I wrote of serious problems concerning David Haas, a fairly popular "katholyc" composer. As you see in the comments section of that post, quite the discussion ensued. His music was published in GIA Publications - until recently.
GIA suspended their relationship with Haas, as allegations of sexual misconduct were resported against him. Apparently the number of allegations is still growing. See this post from GIA's facebook wall for more details.
It appears that we have an example of the principle, "lex orandi, lex credendi, lex vivandi". Someone who holds beliefs at variance with God's revealed truth will most likely live their lives in disobedience to those truths.
GIA is suspending their relationship with Haas. I strongly suggest that all Catholic music directors remove Haas' works from their repertoires. They should also be mindful of the composers' obedience (or lack thereof) to the teachings of the Catholic Church.