According to a consumer survey by JD Power & Associates, the overall quality of new cars has improved, although complaints about complicated on-board audio, entertainment and navigation systems were on the rise, LA Times has reported. Overall, owners of 2012 vehicles reported 5% fewer problems during the first three months of ownership, compared with last year's survey. However, complaints about multimedia systems rose 8%, and 45% since 2006. JD Power put much of the blame on technology that's relatively new for cars, including voice recognition. Toyota's luxury brand, Lexus, took the top spot with 73 complaints per 100 vehicles, while Jaguar and Porsche tied for second place with scores of 75.