I haven't looked into this bug at all, but I found something in the manpage of apt_preferences that could be related to this behavior: · If two or more versions have the same priority and version number but either the packages differ in some of their meta- data or the --reinstall option is given, install the uninstalled one.
IMHO this means that if you somehow got two different packages with the same name and version number into your cache you will see a similar behavior as described in the bug reports. Again, I don't know if that has anything to do with the problem described in the bug reports (other then resulting in the same symptoms), as I haven't had time to have a closer look at the problem. Cheers, Christian
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