Well, that's the whole thing then, isn't it? The huge CSS framework probably had tons of hacks (as you say) to make things work in IE8... it's a bit disingenuous to say you wrote everything to be clean and without browser hacks, if the hacks all exist but are buried under a "huge CSS framework".
Your whole experience could probably be restated as "I was working with a CSS framework that did a bunch of cross-browser hacks for me, and the tweaks I made to it didn't work in safari", which is a pretty uninteresting statement, because it's equally likely that any issues you had in safari are the fault of the CSS, and not the browser. (In fact, much much more likely.)
Well, that's the whole thing then, isn't it? The huge CSS framework probably had tons of hacks (as you say) to make things work in IE8... it's a bit disingenuous to say you wrote everything to be clean and without browser hacks, if the hacks all exist but are buried under a "huge CSS framework".
Your whole experience could probably be restated as "I was working with a CSS framework that did a bunch of cross-browser hacks for me, and the tweaks I made to it didn't work in safari", which is a pretty uninteresting statement, because it's equally likely that any issues you had in safari are the fault of the CSS, and not the browser. (In fact, much much more likely.)