The following function has been added in version 1.10
1. Wireless control of external flash through built-in flash.
2. Instantly return to centre AF point by one push of button in AF select mode.
3. Possible to change ISO setting by dial at TV/AV mode.
4. ISO setting change by dial while the ISO setting is being displayed on the LCD by pushing OK button.
5. Green button function in M mode is available at TAv mode (Hyper manual).
6. AV and TV switch by dial at P mode.
7. Instant return to the default value by green button at strobe light compensation.
The following contents have been corrected.
1. In rare case, vertical stripe at long time exposure.
2. Released “B exposure” and show battery empty sign when using B mode.
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An unofficial firmware upgrade for k10d has been leaked, and can be found on forums such as dpreview.com's pentax section. Most changes are pretty much demanded by many users. Yet update at your own risk

http://rapidshare.com/files/12484420/K10D_firmware_1.10.zip