Any abilities that triggered on blockers being declared or that triggered during the process described in rule 509.1 are put onto the stack before the active player gets priority; the order in which they triggered doesn’t matter. (See rule 603, “Handling Triggered Abilities.”)
September 30, 2011 · Innistrad
During the declare blockers step, if a blocking creature is removed from combat or a spell or ability causes it to stop blocking an attacking creature, the blocking creature is removed from all relevant damage assignment orders. The relative order among the remaining blocking creatures is unchanged.
June 17, 2011 · Commander 2011
During the declare blockers step, if a blocking creature is removed from combat or a spell or
February 4, 2011 · Mirrodin Besieged
During the declare blockers step, if a blocking creature is removed from combat or a spell or ability causes it to stop blocking an attacking creature, the blocking creature is removed from all relevant damage assignment orders. The relative order among the remaining blocking creatures is unchanged.
October 1, 2010 · Scars of Mirrodin
During the declare blockers step, if a blocking creature is removed from combat or a spell or
February 1, 2010 · Worldwake
During the declare blockers step, if a blocking creature is removed from combat or a spell or ability causes it to stop blocking an attacking creature, the blocking creature is removed from all relevant damage assignment orders. The relative order among the remaining blocking creatures is unchanged.