I'm guessing I've had this problem, especially with taking Questran on top of things (I guess it can suck up your Vit K). I take a multi-vit that has it in there. But for me the bleed was NSAIDS.
Diagnosed with Crohn's Disease 2/06 after sever GI bleed. Has been suffering since 1998. History of rectal fistula and gallbladder removal. Taking Asacol, Questran, Toprol XL (for high blood pressure).