The clipping algorithm is binded to camera lens curvature now, so the cliiping plane's shape is close to hemisphere. It leads to a "keyhole effect" while the starting clipping point is placed near the wall or another object. The correct clipping plane should be straight.

Here's an example (attachments doesn't work foe some reason): http://www.yafaray.org/phpBB3/download/file.php?id=5980&mode=view