This error occurs when evaluating an obsolete [BoxFit] token. You should use the [BOXFIT] token instead.
Because of the way that rotation of textboxes are performed internally by QuarkXPress, resizing a textbox means rotating the box back to 0 degrees, resizing it, and then rotating it back to its original value. However this re-rotation is performed by rotating about the center of the box, which has changed position since the box has changed size. This implies a complex coordinates transformation on the part of Q++ to ensure that the resulting box appears where and how one intuitively expects it to. However such a calculation only has meaning if the box is at multiples of a right angle (90 degrees, hence the message).