I still have a few problems with Safari, including the fact that it doesn’t appear to support font-variant: small-caps; as a result my date headers appear in lowercase. But I bit the bullet and redid my CSS so I wouldn’t fall prey to the problem that was hitting me with a div nested inside my H3 tags, so most of my page now displays correctly.
For the record, I just appended the border effect I was using in my “grabber” div to the H3 style definition. It means I have to update multiple places in my style sheet if I decide to get rid of the blue bar effect, but it seems a small evil to put up with.