Ok, looking at your code helps. I'm wondering if the simpleChild option is causing the problem. Can you try the same code, but without the simpleChild option in both cases?
You've got two child columns depending on the same parent, which is somewhat unusual, but that the SPCascadeDropdowns function should support.
The reason that you may not be seeing problems in Firefox is that SharePoint only uses the complex dropdowns in IE, not in any other browser. I'm not sure what you mean by "This behaviour is not seen when the SPCascadeDropdowns are used".
M.
You've got two child columns depending on the same parent, which is somewhat unusual, but that the SPCascadeDropdowns function should support.
The reason that you may not be seeing problems in Firefox is that SharePoint only uses the complex dropdowns in IE, not in any other browser. I'm not sure what you mean by "This behaviour is not seen when the SPCascadeDropdowns are used".
M.