Take Lao She's Rickshaw Boy (Luotuo Xiangzi). The American translator completely changed the ending, so that in the last chapter Xiangzi suddenly realizes he has erred. He busts his lover out of her brothel and the two run off into the forest to make a home together and live happily ever after. The translator simply assassinated the original book!
像老舍的《駱駝祥子》，美國翻譯者把結局完全改了，最後一章，祥子好像醒過來了，他跑到妓院去，把當了妓女的愛人小福子搶出來，兩人跑進樹林裡，找到一片天地，以後就過著非常愉快的生活！