I have just installed SP4 on W2K and all of the current patches for W2K and IE 6.0. I can no longer open .zip files that are attached to Lounge posts by clicking on them. Instead of getting PKZIP opened when I click on a .zip file, I get another instance of IE that looks like the image below. Is this some new security setting in IE? If I right click on the .zip file and save it to my hard disk and then double click on it, it opens with no problem, so this is not a file association problem.