The Calendar module requires a more current version of the Date API

Hi,

I am having a minor issue with this module. I am assuming it is this module causing the issue and not another, and also assuming it is not me doing something stupid. I have the Calendar and Date modules installed, but see the following messsage in the status section of the site:

The Calendar module requires a more current version of the Date API. Please check for a newer version.

I have tried Calendar 6.x-2.2 with Date 6.x-2.4 and 6.x-2.x-dev (11th Nov - latest at present). Have also updated Calendar to the latest Dev release (6.x-2.x-dev - 20th Nov) with the Dev release of the Date module, but still get the same problem.

When I update I do the standard:

1. Remove old module (i.e. delete the dir)
2. Copy new module
3. Run update.php

I have even tried uninstalling both modules (deactivating and uninstalling) but still no luck.

I have seen the same problem posted in relation to the Drupal 5 version, but nothing for Drupal 6. Is this a bug or something I have done wrong?
Cheers,
Nick