Fiedler (spoilers)
Let me begin by saying I read the book for the first time recently and thoroughly enjoyed it, but I made the fatal mistake of watching the movie too soon after finishing the book and so had my mental pictures of the story confronted too soon by the movie's.
Naturally the movie cuts a lot of the the deeper character development, which undoubtedly had to happen given the book's dialogue-heavy nature. However, one character that particularly bugged me was Fiedler. In the book, Fiedler comes across in conversation as something of a gentleman; inquisitive and persistent but also tactful at the same time. Gradually the reader begins to like him and maybe even sympathise with him as a slight camaraderie develops between him and Leamas, most evident in the hospital after they're both beaten up by Mundt's men.
In the movie, Fiedler comes across as quite abrasive, impolite from the moment he arrives and generally rude and impatient with Leamas, as well as his own colleagues (or should I say, comrades). Not to say that this isn't believable treatment of a defector (it's more believable than the finely-tuned poetic interrogation in the book) but to me it made Fiedler unlikeable, which IMO ruined the whole ending, as I found I didn't particuarly care when he was betrayed by Leamas. In the book, the betrayal hits you, as was surely the intention. The other characters I felt were well chosen but I couldn't warm to Fiedler's depiction at all.
Any opinions feel free to share.