Hate to contradict people but with websites I see and deal with on a daily basis (about 200 unique sites/week) here's how I'd rank browsers from a tech support standpoint:
Firefox 3 / 3.5
Firefox 2
Exploder 7
Exploder 6
Exploder 8
Chrome
Safari 4
Safari 3
Safari 2
(Every once in a blue moon I get a customer who still uses Nutscrape 4x or Opera, but it's as rare as seeing an MS Frontpage site that looks halfway decent)

These ranks are determined on each browser's combined security, stability and rendering issues. Why? UNFORTUNATELY, most people build websites designed for IE and test Firefox as an afterthought. Safari rarely gets tested. MS Frontpage, Expressions, and Publisher (GAH!) websites render poorly in anything but IE if they render correctly at all. Visual studio (.NET) websites out of the box work poorly as well but are usually dealt with pre-launch. If this weren't the case, I'd rank Safari up and tied with Firefox. However, Firefox can deal with lousy "MS-HTML" better than Safari and Chrome.

Now, those ranks having been said, would I PERSONALLY use IE above Safari? No. Never. The only time I use IE is "IE Tab" because sites just don't render properly in Firefox sometimes. I don't know if it's Adblock or another plugin but even http://dodge.com does not work in FF for me correctly. Since I have IE tab I don't care enough to see if it is just adblock, either.

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k

Dunno. Sounds like you need an Apple guru to have a look. I've got a 2006 Macbook Pro and this site (and all others) work great in either Firefox or Safari.

I refuse to use the garbage that is IE, so cannot comment on how this site works in that browser.

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'98 E300 turbodiesel