Yesterday I was shooting drift challenges and after that I started to clean the camera because it was dusty from the outside. I was amazed to find that there was dust inside too. I was very careful when changing lenses(2-3times for all day) and battery(ones) SD card- not so careful. So I have contacted this morning the local company who sells Pentax. They have contacted the service and the answer was that the camera is sealed only if every door is closed and the lens is WR, if you do not operate with the doors in clean safe place WR doesn't work even makes worse because when you open the SD card door it can suck air with dust.
Personally me - I don't think this is dust from yesterday and I don't think it came from any door because if it was from the bayonet or any door there was going to be even more dust but it isn't. So my point is that the dust was already in the camera and air spread it on the screen or it came from the edge of the screen.
They also told me that if it is a problem for me I must pay the cleaning because it was my fault not using the body properly.
So... be extremely careful with K30! WR is not that good as in older models and I think it is going to be a problematic camera. I have used in the years many other cameras most of them without sealings and never any of them had problem like this one!
PS I have found even worse case:
http://forums.dpreview.com/forums/thread/3292877
This is really bad!