The Point from intersection of line and arc tool produces incorrect arc. The value for radius appears to be doubled. The circle shown has radius that is two times too long.
The attached file shows a box that is 480mm high, and a circle with 470mm radius. The options show that the radius should be 235mm. The displayed circle has a radius of 470mm, twice as large as it should be. Interestingly, the point at the intersection of the line and the radius is correct, it is calculated at 235mm radius. So it's only the display of the circle that is incorrect. I suggest this is a major bug because it has great impact on the usability of the program, even though it may be an easy fix.