A
QTW 2.1, 2.1.1, and 2.1.2 add video hardware support for a number of chipsets
that QTW 2.0.3 didn't directly support. The Cirrus Logic GD5429 is one
common example. Since hardware support wasn't available under QTW 2.0.3,
the draw method would default to driver mode. This worked well with QTVR.
QTVR movies tend to crash my GD5429 system when it is in hardware draw mode. This mode wasn't possible until QTW 2.1. The solution is to use the Control Panel to change the Draw Method back to driver mode. On my 486-66, I don't see a speed difference anyway.