From: green on
Marcelo Laia wrote at 2009-10-07 14:06 -0500:
> A few days a go I upgraded my Latitude D630 to unstable. But, after a
> lot of problems, I downgraded to testing again. But, I still with same
> kernel (may be 2.6.29, I am no t sure here!).

Downgrading is not recommended.

> After a safe-upgrade I see the message:
>
> .udevdb or .udev presence implies active udev. Aborting MAKEDEV invocation.
> .udevdb or .udev presence implies active udev. Aborting MAKEDEV invocation.

As I understand it, if udev is active, then invoking MAKEDEV is unnecessary.
Therefore, this is not a warning but just a notification.