Suspicious Web Page Blocked - Yahoo Mail

I get this screen and the address us.mg4.mail.yahoo.com/dc/launch.yada yada when downloading some attachments from yahoo mail - I click off this page and the down load works - what's going on? I'd like to get rid of any annoying false positives if that's what it is or is there a problem? Thanks

 

[edit: Removed broken website link.]

 

Message Edited by shannons on 08-22-2009 12:31 PM