I have recently upgraded hudson to latest jenkins(1.437 and later to 1.439). Ofcourse the migration went pretty smooth, but recently I started facing a problem related the existing build numbers of one particular job. In the Build history(left sidebar of any job page) I am
seeing duplicate build numbers. Check the first attachment named "duplicate_build_numbers". When you reload the same job page, it displays only one unique build and no duplicate builds. But after a few seconds(may be 3 or 4 secs) the duplicate build is coming up.

I checked the "builds" directory related to that job and found only one directory related to the build. For the build mentioned in the
figure I saw only one directory named: "2011-10-16_01-06-08"

So is there any issue in the way Build History is shown to the users or Am I missing anything ?