Lightwave 9.5 Collada import is wonky - being fixed in beta so don't really blame poserpro.  PoserPro lightwave plugin works pretty well for me with lightwave 9.5, though I don't do animations some are.

PoserPro IS poser 7 with some under the hood tweaks and new gamma options.  It's not standard poser 7 out of the box that's for sure.

LIghtwave 64 has issues too, so blaming poserpro is kinda not right either.

There are currently very few native fulling working 64 bit 3d applications.  Hell Luxology modo even says on their web site that Modo is not certified for Vista, meaning even Vista 32 - though it works for a lot of people.