In JavaScript API v1.2 placing the map <div> tag inside a <center> tag causes the map data to be shifted to the right and zooming does not work properly in Internet Explorer 6 and 7.
Put a new style in the<a href="file:c:/Inetpub/wwwroot/ArcGIS/rest/ESRI.ArcGIS.Rest.css" target="_blank">c:\Inetpub\wwwroot\ArcGIS\rest\ESRI.ArcGIS.Rest.css</a>:.map { text-align: left;}