Your Linux systems may not have the correct fonts. This can happen because you are using a different JDK from the one that comes from Sun. Change the look and feel from “Metal” to the default. This should fix the problem.
In the shell script lattixarchitect.sh, which is in the Lattix bin directory, change the line:
$JAVA_HOME/bin/java -Xmx999m -Dswing.systemlaf=javax.swing.metal.MetalLookAndFeel -cp "$FULL_CLASSPATH" com.lattix.application.cmds.LattixArchitect $*
$JAVA_HOME/bin/java -Xmx999m -cp "$FULL_CLASSPATH" com.lattix.application.cmds.LattixArchitect $*