I've been a website designer since 1997.
The current versions of Safari, Internet Explorer, Opera, Camino, OmniWeb and FireFox 2.0 all render graphics in tables correctly, and in the same way.
FireFox 3.0 does not! It adds extra padding to the tables so the graphics split apart!
Graphics in tables? Tables? Tables are for tabular data.
If one just had to crutch it for a lack of semantically correct skills and use a table for a layout (barf), then if it's coded correctly there is no extra padding.
I have to give FF props on this one. If I put a div somewhere, FF puts it where I tell it to. IE 6, rarely; IE7, sometimes, but more than 6; IE8, shockingly it's been less hassle than expected, but still needs it's own special love at times. Safari is usually good with it, although on occasion it has its moments too.
The Mozilla development team takes the attitude that the way they do things is correct and, if all the rest of the world does things differently, they are wrong!
Unfortunately, there isn't much weight behind that statement. All browsers have their quirks, but I'll take FF and their approach over anything, any day.
For browsing, I like both FF and Safari, although I use as many as I can get my hands on at times.
It sounds like 3.5 is an improvement, which is good, but also as with any other improvement there is still work to be done.