Hello!
Got my Pentax K-5 back from repair here today, with a new and spotless sensor.
I bought my K-5 in February 2011 and noticed the splotches almost immediately but was too lazy to do anything about it whilst under warranty.
Dust specks on the K-5 @ f/22
I was then pleasantly surprised when I contacted the service center this August and asked them if they did repair it and they said that they did and even free of charge. Not bad for a 4½ year old camera!
The K-5 has long since been replaced by a K-3 in this household but perhaps I should treat it to a nice outing with the newly repaired DA*16-50/2.8.