I agree with Phantast that Vue 5 bugs should be fixed in Vue 5.   To have to pay once for a product and then pay again for a version of it that works is not acceptable, BUT...

...my experience of Vue and Carrara doesn't quite coincide with a lot of the preceding comments.   I'd say that V5I is more stable than Carrara and just as good at importing Poser material;  both tend to lose some Poser textures, so neither is ideal.   I have found bugs in Transposer 2 and the native importer for Carrara 5.   The original Transposer contained more bugs than the average rain-forest.

Furthermore, the vendor's attitude to Transposer seems to have been, up until now, exactly the one that E-on is accused of in this thread, i.e. fixing bugs only in the next release.    What is Transposer 2, if not a roll-up of long overdue fixes for Transposer?