Autocomplete emptying after adding contacts

Hi,

I'm having an issue with Microsoft Outlook 2007 for a few of the users

on my network. When new contacts are added to their contact list, their

autocomplete list emptys until they repopulate it.

For a solution I've had them download and use NK2Viewer, but I was

wondering if their was anything anybody could think of to help me

resolve this issue.

It's an intermittent issue, and it's one I myself don't have.

Sometimes when new contacts are dragged to their contact folder they no

longer have their autocomplete and sometimes they do. My first thought

is that it's a corrupt .nk2 file, but one of the users complaining of

this problem has a brand new build, and I find it extremely unlikely

that this is the cause.

Does anyone have any ideas?

Thanks.

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K2itmgr