Working on a MAC using Firefox - When attaching a jpg file, it automatically downloads as a zip file - I do not want them to be saved as a PC ZIP file. When I try and open the downloaded jpg and choose "OPEN" with Adobe Photoshop CS5.app - I get the message that Photoshop cannot complete request because it does not recognize this type of file - which is a zip file. I don't have this problem using Safari and never had this problem with Firefox in the past. Help!