I force the Javascript console to log all possible warnings.

In selenium-browserbot.js, function PageBot.filterFunctions.name, there is a:

if (elements[i].name === name) {

which generates a LOT of warnings, because almost all my HTML elements have NO NAME.
Solution:
        if (elements[i].name && elements[i].name === name) {

In selenium-testrunner.js, function form.createHiddenField, there is a:
 input = document.createElement("input");

which is syntactically incorrect, since the input variable will become global.

Solution:
 var input = document.createElement("input");