DTS shadows fail on mirrored brushes

This might be a known problem already. But I'll mention it here just in case someone else has the same problem. Be careful about mirroring brushes (by doing a Planar scale of -1 on the X-axis). I found for brushes where I did this, they looked fine except that the player's shadow would not display on them. If you want to test this out, here's what I did. I created a wedge, exported it. Then scaled it along the X-axis by -1 and exported it again. If you put both dif objects in your scene, you should see that your player's shadow only displays on the un-mirrored diff.