issues when submitting form with s:a and targetting parent div

The JSPs being described will be attached to this issue.

index.jsp contains simple ajax form.
triggered by element <s:a>
If it's
targets
property is set to parent DIV ('parentDiv') then it FAILS TO ATTACH PARAMS to the submitted forms.
If I change targets to 'dataDiv' then it works.

I reproduce the issue under IE 6 SP2, windows XP with latest service packs.

Because of this I cannot really submit remote forms under IE