Hi Martijn,
The version of the name picker is the following:
-- Modified by : Martijn de Jong<br/>
-- Company : ilionx ICS<br/>
-- Date : 8-2-2010<br/>
<br/>
I am using IE 7.0.5730.13., but had the same behavior with Mozilla firefox 3.5.9
The DB is on a Domino Server 8.5 running on Linux.
The code used to trigger the name picker is :
NP_openPopup(this.id,"",this.name,'M',"");blur();
on the "onfocus" event of the field.
Hope this helps.