Fallback item versions are dumped incorrectly on package building or serialization. As a result, further package installation or reverting of such an item creates real versions for all the fallback languages.
This patch fixes the BuildPackage control and serialization commands (itemsync:dumpitem and itemsync:dumptree).
The bug is fixed in Sitecore 8.2 Update-1.
This patch is licensed under the Sitecore Corporation A/S License for GitHub.
Downloads are available via GitHub Releases.