new beetle tire wear

i have a new beetle (2004 TDi) which had been wearing out front tires on the inside - almost up the sidewall. I had the tracking checked and it was fine. I also returned the car to VW who carried out a check on the camber. They said it was marginal but they reset it. However the tire wear has started again with the same symptoms. Tracking ok but tire wear almost up the sidewall on the inside.

has anyone else experienced anything similar or have any idea what is going on?

thanks

I'd take it to a wheel alignment place (not VW) for a second opinion as it sure sounds like an alignment problem.