My own opinion is that in case-sensitive mode, writing "a" should not found the accented "a" unless it is in decomposed representation (and even then, only if y

My own opinion is that in case-sensitive mode, writing "a" should not found the accented "a" unless it is in decomposed representation (and even then, only if you are searching for "a" itself, since if you follow it by another letter, then it will no longer match since the combining accent mark intervenes), but never matches a precomposed accented "a". In case-insensitive mode, the behaviour should be locale-dependent and configurable by the user.