Had the same problem with my Matshita 9571 burner. Made lots of expensive coasters! Panasonic work fine and are available from
click here price £8.50 pack of 5. I think this is a good price, postage was free last week but has now gone up to 95p! Still a bargain compared to having lots of useless plastic discs. Would like to know if anybody has tried MR DVD DVD-Rs with these burners?