I had my winter wheels swapped over last weekend and 2 worn summer tyres replaced with new. The fitter checked my wheel alignment and found all 4 wheels off. He adjusted the fronts but told me the rears can't be realigned because of the solid axle. Now today I woke to find a flat new tyre with a big screw stuck in it. Not happy. I took the car for a puncture repair and they told me my older 2 tyres are miss shaped due to the alignment being out. Trouble is they were previously on the rear. How all 4 wheels could be off on a 2 year old car puzzles me. Hopefully the dealer can help when I book in for my inspection.

Potholes and speed bumps!

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Wheel alignment won't make a tyre out of shape. More like it has stood still for a long period of time causing a flat spot.

That's the one major downside to the torsion beam suspension setup. If the tracking/alignment goes out of whack on the back then you're pretty much stumped. 

 

I only say this as I have that problem on my own B5 Passat. It's a nuisance as it's the only thing wrong with the car..!