The only UI change in CS3 besides its ugly “periodic table” branding style is how the toolbox defaults to a single tall column by default, toggleable to 1.0–CS2 double-wide style by clicking its header. Source: Daily user of the activation-free “offline” CS3 Adobe gave out after shuttering the CS3 activation system: https://i.imgur.com/9XVQaF0.png
No, CS4 was the one with the new UI, not CS3: https://techcrunch.com/2008/06/23/yes-virginia-adobe-photosh.../
The only UI change in CS3 besides its ugly “periodic table” branding style is how the toolbox defaults to a single tall column by default, toggleable to 1.0–CS2 double-wide style by clicking its header. Source: Daily user of the activation-free “offline” CS3 Adobe gave out after shuttering the CS3 activation system: https://i.imgur.com/9XVQaF0.png