I upgraded a customer to 7.3 sp 1 and the SSA fields don't work on the Lead to Company screen. So on the lead screen when you click on Add or Find Company it pops up the company entry screen. When you click on the magnifying glass nothing happens. looking at the onclick event it's supposed to call the following...
try {if(event)event.returnValue=false;} catch(err) {} NavUrlcomp_vsrregionid();
However in looking at the scripts on that page, that function doesn't exist. It does however exist when I create a new company or edit an existing one. So it only appears to be an issue on the lead to company screen. Probably has something to do with it being a popup window because there is also an issue with the crm.fields object not getting populated on popups as well. These issues need to be fixed as soon as possible please because it's causing issues with a customer. Thanks.