If you haven't heard already, Microsoft has just released their flagship Internet Explorer 10 (IE10) for Windows 7 about a week ago, which we believe will spread pretty quickly.
To fix the issue in your existing v3.0 deployments, please download imagerotator.js using the following link (the file is inside the zip) and copy it over imagerotator.js located under your imagerotator/html/js folder on your webserver. To update your SpotEditor (desktop) installation, please first find imagerotator.zip in your SpotEditor application installation folder and replace imagerotator.js inside this zip (located under html/js inside the zip).
DOWNLOAD FIX FOR V3.0
PS: if you are using the latest beta 3.5 (it's just a couple of weeks old, so very few folks are using it at the moment), you can download updated build here. Only imagerotator.js under imagerotator/html/js has been affected since the last beta drop.