Official:BugVisualGlitch
From YPPedia
Bug Reporting
Graphics glitches
Most problems with graphical glitches, blue regions of the screen, invisible pirates, and missing buttons and panels are caused by missing or corrupt files in your local Puzzle Pirates installation. To solve this problem, use the following instructions:
- Windows:
Download and run the full installer from https://download-cdn.puzzlepirates.com/yoclient/puzzlepirates-fullinstall.exe, making sure to quit Puzzle Pirates once the download finishes but before you run the installer. - Mac:
Close Puzzle Pirates, delete the Puzzle Pirates application, then download and run the Mac installer again from https://www.puzzlepirates.com/yoclient/yohoho-2--en-install.dmg - Linux:
Run rm -rf ~/yohoho assuming that you installed Puzzle Pirates in ~/yohoho. Then, re-download and run the Linux installer from https://download-cdn.puzzlepirates.com/yoclient/yohoho-install.bin
If you continue to experience problems after reinstalling Puzzle Pirates, please report the issue here.