It looks like the Droid RAZR HD and MAXX HD are receiving an extremely small OTA update -- about 6MB -- according to Verizon support documentation. There's just one bullet point to this update, "Updated Google Security Patch has been added.", which is pretty obscure. Rooted users beware, this may be closing up an exploit hole that you used. Better wait and see what the final implications of this update are.
That aside, it's always good to see updates coming out, even the small bug fixes like this.
Source: Verizon Support; PDF; Thanks everyone who sent this in!
More: Verizon Droid Forums
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Droid RAZR HD and MAXX HD receiving small security patch OTA