Hey Swift owners-- I'm encountering a problem with a new Xootr Swift and I wonder if anyone else has experienced it.

When I shift to the small cog, I can hear the chain rubbing on the chainstay. This is more than slap-- there is a scratch through to the metal-- small right now, but I can imagine that if it continues there will be some potential for failure.

I should say that I've already spoken to Xootr and they immediately expressed their willingess to fix or, if necessary, replace. (I'm still in the 30 day return window, though their eagerness to solve the problem didn't seem to me to depend on this).

I really do like the bike. My preference would be to return it, get a new frame without this problem, go on happily. But this seems to me a (potentially) serious issue. Has anyone else encountered this problem? If this is a one-off manufacturing error, fair enough-- things happen. But if this is a design issue, it is another story.

Thoughts?