Yay for updates!
This one is fresh! It's not even on Versiontracker yet!
This update adds a bunch of fixes and reintroduces custom palletes.
ftp://ftp.corel.com/pub/Painter/8.1
(or just to go their site, Downloads -> Updates)
NOTE!
Before installing the Corel Painter 8 Update, please follow the instructions below:
1. Uninstall or remove Corel Painter 8 from your computer. If you have any custom brushes or content libraries, make sure you save those to another location on your computer first.
2. Install Corel Painter 8 from your CD. Do not launch the application after the installation.
3. Install the Corel Painter 8 Update.