Good to know. I too am havimg the exact same issue. 2010 Mazda 6 in Metairie LA. Sales rep that I spoke to told me it was because I cleaned the interior window surface with windex and some of it started a chemical reaction to cause it to melt. Googled it and found this page. Good info. Guess I will just try and find those dashboard mats to try and cover it up.I was told that Mazda would pay for the dashboard part ($226.96) and I had to pay for the labor ($324.84). This was at the dealership in Metairie, LA. I was most unhappy over the fact that I had to make a decision as to whether or not they did the work by 5:00 pm on the same day the Mazda representative looked at it or they would withdraw the offer.
This is such a disappointment. I had a Mazda 626 that was 11 years old when someone totaled it on me. This car is not quite 5 years old and that part of the dash has to be replaced to correct the problem. I was also told it may not be a permanent fix!
My Mazda 6 2010 is doing the same but it is from prior models as well. It seems to go back to atleast the 2008 model. So to me it just says Mazda is a sorry company that cannot fix an issue and expects their customers to suffer for their stupidity on not fixing it from previous models. So suck it Mazda you'll not be getting my business anymore.