DOpus stays on top - ish

I use Media Player Classic on my XPSP2 system, set to be "On top while playing". This works fine, except with DOpus, which somehow seems to ignore this. Hence, while I'm playing a video, Media Player Classic stays on top of all windows except DOpus. Is there a setting someplace in DOpus that forces it on top when it has focus? :question:

[Why are my Opus windows on-top?)