Version:            (using KDE KDE 3.4.2)
Installed from:    Debian testing/unstable Packages

A tab in a javascript string should always count as 1 character. However, konqueror from kde 3.4 (and according to Sho_ on IRC also konqueror from 3.5) seems to interpret a tab as 8 spaces rather than as one character. Thus the substring method can be severly off.

As an example, the following JavaScript code shows the problem (note that there is exactly one tab character between "Is" and "this", as well as between "No" and "Yes"!):

var myString='Is	this No	Yes Yes ';
var tmpAnswer=myString.substring(15,18);
document.write('<p>Is this correct: '+tmpAnswer+'</p>');

In Konqueror, the tab after the "Is" is counted as 8 spaces, thus the substring begins at "No ". In all other browsers (firefox and opera), the tabs are counted a as one character, so offset 15 is right at the last "Yes".
I'll attach the sample file for quickly checking the bug.

Cheers,
Reinhold