Man I guess I didn't have enough coffee yesterday.
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My bad.
So looking again and this time getting the information correct, your router doesn't have any other FW updates at this time. No we can cross platform FW. LOL. Sorry about that. Didn't mean to be mis-leading. Wow. I messed this one up.
So I would for now, use Opera or FF to manage the router. I would send an email with detailed information to DLink and let them know there seems to be an issue with IE9 and that you've check compatibility modes and this is the only browser that seems to exhibit this issue. If you can get a hold o***ood tech, maybe they might push a FW update out to fix that if they can replicate your problem.
Other than this problem is the router working well for you?
Again, I apologize for confusing your model number.