I would recommend to do a reset!
You go in the menu to the 3rd tab of the setup menu and there you select the reset option.
This is not actually a real factory reset.
If this does not change anything, check your firmware!
Download the latest firmware or even better, download the unofficial magical 1.10 firmware
HERE
this is the very best firmware for the K30, because:
1. it allows you to use the PLM lenses
2. the K30 is that bit faster
3. ISO up to 51200
4. because usefull for you, it is almost a factory reset!
Change Noice-Reduction at high ISO to custom settings and set it to:
100 - 400: off
800/1600: 1
3200/6400: 2
12800/25600/51200: 3
You can also learn to go into the Debug-menu, you need to download here:
Dropbox - K30 - Simplify your life
And then report! Very important for those who try to help!