vc problem

Lately, I have started getting these messages whenever I do vc checkins (files are in RCS). File has unlocked changes, claim lock retaining changes? (y or n) It doesn't matter how I answer the question, or whether I revert the file to the original changes but vc continues to claim that there are 'unlocked changes'. What is odd, is that the changes that it vc shows in the *vc-diff* buffer appears to be the entire buffer, with the only change being a ^M on each line. I'm on 21.4.3 windows xemacs with almost completely upto date packages. -jeff