Adsync & blank fields a bug?

Hi

We are using adsync which is working very well.

(domino 6.5.1)

However, when we clear a field in the AD (for example the telephone number) the field is not blanked out in the Domino directory after synchronisation. Only if we type something else in the field, the sync is perfect.

Is this a bug? Can someone confirm this?

Thanks

Vanessa