We have a third-party external web page on another domain that we’re loading in an iframe, and we’ve found that in IE7 none of the select drop-downs in the iframe page react to mouse clicks. The drop-downs seem to populate okay, but if we click on the drop-downs they become highlighted but the options box doesn’t drop down. Once highlighted the options can be changed using the mouse wheel or with the keyboard arrow keys. Other HTML form and other elements also work fine. We’ve reproduced this on Windows XP SP3, but we’re not sure if it’s tied to that operating system.
Both sites are SSL, and there are no security warnings showing up. It seems as if there’s some div or other element on a higher z-index interfering with the iframe page interaction, but we can’t find anything. The interaction also works fine when the page is loaded from the same domain without SSL, running inside a non-SSL test page in our development environment. So it seems likely to be a problem specifically related to SSL and/or the fact that the contents of the iframe are coming from a different domain.
This also works fine in all the other major browsers we’ve tested in.
Same problem over here. Seems to be a problem with the KB2586448 update
http://support.microsoft.com/default.aspx?scid=kb;en-us;2628724