When I run Chicken 2.2b2 on my MBP Retina display in Windowed mode, I cannot scroll the display without it getting corrupted. I usually run my VNC session on the UNIX machine in 2560x1300 resolution in order to fill the screen on my external Thunderbolt monitor, but when I run without that monitor, the scrolling is all messed up on the Retina display.
When I do have the external monitor plugged in and I'm in dual-screen mode, I can move the window onto my external display and have it scroll properly, but when I move that very window onto my Retina display, the display corruption issues can be seen.
One more thing. When I have the external display disconnected and I run Chicken in full-screen mode, the display corruption issues go away.
My MBP is the mid-2012 version w/ nVidia GeForce GT 650M 1024 MB graphics, 2.3 GHz Core i7, and 8GB of memory. I have Mavericks OS X 10.9.1 (13842).
Thanks for the bug report. This has been fixed with SVN revision 828, which will be released in Chicken version 2.2b3.