There were a few changes about a week ago that results in diff -p outputting slightly more (and better) information. This may result in update-patches outputting longer contexts. For C++ code, it will no longer stop at public: private: protected: thus diffs on class definitions will now report the class names, and not that useless stuff.
So please try to run current diff. (you probably don't even have to update the rest of the system if that's really too troublesome).
