Weird.  I wonder if the clutch cover is warped/bent?  Thank goodness it's under warranty--as long as you don't get some band-aid solution from the dealer.

I googled it and couldn't find another mention of 690's having an oil leak problem, so you may have a very rare, defective part.  If a new o-ring doesn't fix it, demand a new clutch cover.

You didn't smack the clutch cover on anything did you?  If there's any mark AT ALL, they'll put it on you.  I had to pay for my new clutch cover because it was rubbing on my clutch internals after a mild crash.

If that's the case, I suggest the following:

The new o-ring seems to have done the trick; you would have thought that the oil filter would have come with one.  I just took it around the block, but no leak so far.  I did use the advice from the SMC website and put a little grease around the o-ring grove before I put the seal in; that seems to help it fit tighter.  I also noticed that the old o-ring had a slightly different consistency than the new o-ring, it seemed to be harder and a little smaller; it could have been from the engine heat.  Anyway I found the new o-rings at Lowe's, two for $.89 cents.

True; orange o-rings cost more!