Miquel van Smoorenburg writes ("Re: Bug#4218: Problems removing INN"):
> You (Ian Jackson) wrote:
...
> > Would it be better if I made dpkg treat [EBUSY] as a warning ?
> > (It happens one of the directories in a package is a mount point).
>
> Yes, I think so. Every directory can be a potential mountpoint.
This will be in 1.3.11.
Ian.