I'm quite sure this is finger trouble on my part but I'd welcome some advice...
I imported all (300+) contacts into Zimbra and they were all there. I think they are still there because if I start a new mail and start typing in the 'To' field, then the usual list of names appear.
if I go to the Address Book tab, no names show at all. As I say, they were there but disappeared after I tried to search for someting. Clicking the 'All' button (or any other button) makes no difference - it just says 'No results found'.

I know I must be doing somehting stupid, but can someone tell me what?