This test case demonstrates a problem with Safari 1.3 and 2.0. Using a combination of float and negative margins on an element makes any links in the element unclickable. Text also becomes very difficult to select, and if you tab through the links they disappear when they lose focus. A workaround, as demonstrated in test case 2, is to add position:relative to the CSS declaration for any floated elements with negative margins.
The related discussion is in the post Safari Wishlist.
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