When I use the metacello convenience method #saveModifiedPackagesAndConfiguration: my package mcz uploads fine but then I often get a 400 error for the configuration mcz (I would not say systematic but most of the time). But if I go to monticello and copy it to smalltalkhub from the package cache, it goes fine.
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Damien Pollet
type less, do more [ | ] http://people.untyped.org/damien.pollet