Hi Andi,
Is the left hand side of you screen compressed a little as well, If so i get a similar effect with my TV12AM. I was going to try different PL38's as Andy has said. It doesn't look like a lack of width, more a width linearity problem.
If I get it resolved before you, I will let you know what I did as it may well be similar for a TV22.
All the best,
Alan.