The behaviour has been seen on Win2K and WinXP. It works fine with Win98.
STEPS TO REPRODUCE:
1. Enter dos into full screen mode (by pressing ALT-ENTER).
2. Launch VolatileDuke app.
3. The duke moves much slower than when launched with dos in non-fullscreen mode.
The behaviour has been there since Merlin(jdk 1.4) and hence it's not a regression. VolatileImage wasn't there before 1.4
The problem has been shown to Chet Haase in 2d SQE lab.