JavaScript error on tab and shift-tab in IE with tabindex

[martinkou]

To reproduce:

1. Modify sample.html and replacebyclass.html such that the editor is surrounded by a few textboxex with tabindex, and the editor's textbox should have a tabindex as well.
2. Open replacebyclass.html in IE6.
3. Put focus in the first textbox, tab until the focus is in the editor.
4. Now press tab or shift-tab.
5. JavaScript error.

[fredck]

I'm just testing it and it WFM. Maybe there is something else in the page to be done to see the problem.

Do you think you could attach a test page for it?