<hr /><i>anonymous added on 2010-10-25 20:09:02:</i><br />
Could this be a result of fossil deciding that an artifact already exists locally because it is in a cluster? If you hit this case, please do a second clone and see if it still shows the problem. If it doesn't, compare the output of

    sqlite3 $repo 'select uuid from blob order by uuid'

for both repo files.