We have a SP2010 environment with 2007 browser based forms. When someone tries opening an attachment (say a PDF) in a form in Internet Explorer, it prompts with "Message from webpage".. harmful computer....
After clicking OK another browser opens in the background and then a prompt to Save or Cancel, no open.
This is not related to the Permissive/Strict setting. Also, Chrome and Firefox work like a champ.
Any thoughts are appreciated.