> Amazon will show the same reviews for different versions of the same book - even if it has different sellers, or is a different translation, or a different edition. (Ignoring all this, this makes a a HUGE pain when trying to decide which translation of a book to buy; normally I don't care much about edition, but if it's a foreign language work I want to find out what translation people prefer.

It's even worse -- Amazon will show "This book is available on Kindle" and link to a completely different translation's Kindle version. They are not equivalent.