I've experienced screen corruption with FreeDOS 1.0 CD - the screen was virtually unreadable
It was run on old Pentium MMX 166Mhz machine with S3 Trio64V+
The same system had no corruption with Linux, MS-DOS and Windows in either Text mode and GUI.
However the same CD showed no (at least not so severe) on other my machines.
It is not a critical for me, but I thought you should be aware of this.