From the FAQ:
Q: When tracing line of sight to the corner of a space containing a figure, does
the figure occupying the target space block line of sight?
A: Yes, if the line passes through any blocked space (a space containing a
figure or obstacle) the target space is not in line of sight. This includes the
target space itself.
Waitaminit. A figure blocks LOS to himself? Seriously? SERIOUSLY??
Ummm. Why? In what universe does this make sense?