DITA WebHelp: 404 Error in IE on 'With Frames'

[MichaelDa]

Oxygen Author 13.0
Internet Explorer 8

DITA WebHelp Output

When a topic is displayed without the Content/Search frame (direct URL to the topic HTML page, not to index.html), and I click 'With Frames', the Content/Search frame opens, but the content frame displays a 404 error.

This does not seem to be an issue in browsers other than IE.

[Radu]

A more detailed discussion is be continued here:
http://www.oxygenxml.com/forum/viewtopi ... 552#p19552