Default behaviour of the infowindow's zoomto link is to pan with a point feature, rather than zoom. I'm guessing this is because a point does not have a valid extent associated with it.
How can I override this behaviour?
Nick
Please have a look at this link:
http://gis.stackexchange.com/questions/28017/arcgis-javascript-api-override-infowindow-zoom-to-funct...
if you would like to remove the Zoom To from the info window you can use the below code in the <style> tag
.esriPopup .actionsPane .zoomTo { display: none; }
If required you can add your custom button to perform the zoom to actions.
Hope this helps.
Regards,
Manish