Ok sorry it took us so long to answer.
Somehow I missed this bug. I am on it.
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Improve zeitgeist.el error handling
Status in Zeitgeist Data-Providers:
In some conditions, for reasons I still don't know still, emacs can
fail to connect to D-Bus. When it happens, and zeitgeist.el is loaded,
it is impossible to open, save or close any file or buffer (any hook
used by zeitgeist.el).
zeitgeist.el should not raise the error if emacs fail to connect to
D-Bus, and provide a fallback secure operation, such as not commiting
anything to zeitgeist.
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