Safari for Windows appears to have been discontinued.
Apple did confirm that Windows won't be receiving Safari 6, and now that Safari 6 is out for Mac users, all possible ways to download Safari for Windows (even the older versions) have disappeared as well.
Due to this, I'm unable to test myself, but I'd strongly recommend that you no longer use the discontinued browser, as it won't be receiving security updates, bug fixes, and such.
Do you have the same trouble in other browsers, like Firefox or Chrome?