There is a compatibility problem between the Apple Internet Router, Timbuktu
3.x, and members of the Macintosh II family running with more than 1-bit color.
To reproduce the problem, put an Apple Internet Router on a Macintosh II and
set the Monitors CDEV to anything other than two-color black and white. When
Timbuktu makes a connection with the router system, the screen on both the
router system and the observing system become mangled. The text in the Port
Statistics window changes size and moves to a different place on the screen.
In the Network Information window, a dark black line appears on the top third
of the screen.
The workaround is to set the router system to 1-bit color. It is possible to
adjust the router system without restarting or breaking the Timbuktu
connection.
Farallon, manufacturer of Timbuktu, says that Timbuktu should be used only in
two-color, black and white mode.