We had the same problem on Rascal, our 275. The first fix we tried was to use spray adhesive which worked for about six months before the lining started to fall off again. Our next solution, which has worked really well, was to pull down the carpet lining leaving it attached on one side, rub off all the loose nasty black stuff (this mustn't get on the nice side of the carpet as it is a 'b****r' to get off, a vaccum cleaner helps). Then we used Copydex to glue the lining back. This is a water based latex adhesive and doesn't have contain solvents (Which is why I think it works well and also has the benefit of being OK in a confined space). The carpet has been back up for two seasons now and shows no sign of loosening.