Legacy exporting as Illustrator 3 from AI CS (3 was probably was patched to 3.2 later, but digits are lost in the greater picture of time) produces no import problem with me. Exporting as Illustrator 8 is no problem either. The only thing is that you have to 'pre-select' that you want to import Illustrator files (see image). Exports 3DS and all from Carrara, import without a glitch too. But, for every format you have to select the particular import enabler (?). I hope that is the case, or else it reeks like re-installing stuff...