my husband had the same experience that you had.
he had colon surgery October 06 with a colostomy. he had a reversal July 07. Jan. 08 he had a colonsocpy- the dr found a stricture at the site of the reversal. he was able to strech the stricture during the colonscopy. The dr. told us that this is a common occurance because of all the surgery in the same area.