I have heard that a haftorah klaf (scroll) is still considered kosher and usable if the Ta'amei Mikra have been written on it. Yet I've always been told that this is not true for a Torah scroll. Why ...
Sometimes people read some verses in Ester and other books in a different cantillation. For example, in Ester, some read the verse of "אשר הגלה מירושלים" to the tune of Eichah, and the Mishnah Brurah ...