Hi Tegwyn,
Using the following text mode in your actual completion date column will display the date in red and bold when actual completion is greater than planned completion.
displayname=
linkedname=direct
namekey=actualCompletionDate
querysort=actualCompletionDate
styledef.case.0.comparison.icon=false
styledef.case.0.comparison.leftmethod=actualCompletionDate
styledef.case.0.comparison.lefttext=actualCompletionDate
styledef.case.0.comparison.operator=gt
styledef.case.0.comparison.operatortype=date
styledef.case.0.comparison.rightmethod=plannedCompletionDate
styledef.case.0.comparison.righttext=plannedCompletionDate
styledef.case.0.comparison.trueproperty.0.name=fontstyle
styledef.case.0.comparison.trueproperty.0.value=bold
styledef.case.0.comparison.trueproperty.1.name=textcolor
styledef.case.0.comparison.trueproperty.1.value=d30519
styledef.case.0.comparison.truetext=
textmode=true
valuefield=actualCompletionDate
valueformat=atDate
The article here on WF One also gives some guidance should you need it.
Unfortunatley, I don't believe it's possible to report on reports that use text mode.
Best Regards,
Rich.