Looking up SSN on stoxline australia i have noticed that the details of the ann today were actually made aware at 3.22pm yeterday, this is probly why we saw that sell off in the afternoon!!
Here is the link to the site that posted it -
http://www.businesswire.com/portal/site/home/permalink/?ndmViewId=news_view&newsId=20100726006856&newsLang=en