@jasef said:
Dan, we tried WebDialog.allow_actions_from_host() with no luck so far.
Correction: this is not an IE10 issue; Win 8 uses IE10 as the default browser, but SketchUp is using IE7 for web dialogs:
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.2; WOW64; Trident/6.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729) Google-SketchUp/8.0 (PC)
The rules for picking doctype (and hence render engine) is different for embedded IE than browser IE. It's much more conservative in order to preserve application compatibilities.
To force WebDialogs to use the latest render mode use the X-UA-Compatible META element.
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>