Pentax France (the Headquarters in Europe) have assured me several times that Pentax JAPAN is aware of the issue and that they are working on the new firmware. Pentax is not hiding it, write to them and they'll tell you there is an issue.
They wrote to me:
Quote: It is the same problem that occured in the K5, and at this point the new K5 firmware is availbla and the problem is now solved. We do not know exactly when the new K-r firmware will be ready.
Releasing an official press info about this is a marketing suicide. They wrote about stained K5's because the issue was serious and the only way to repair it was replacing the cameras.
It's true about Apple and the iPad2, but Apple is a much bigger company and they can afford it. They are hiring probably more engineers and obviously their fix will be released faster.
At least this is what I think.