Just an update from our side.
We've following this error on the web, and Adobe has not sent out any news regarding a fix for this issue. We've also checked our code, and can confirm that the Shockwave issue is due to a fault on Adobe's end, not ours.
As we already know, the Flash 10.2 release version is not compatible with ChessCube, however the debug version is. You can download it here: http://www.adobe.com/support/flashplayer/downloads.html
Note for Chrome users: Chrome manages the Flash version so it is not easy to use the debug version with Chrome.
Download the 'Plugin content debugger for Firefox" or the "ActiveX control content debugger" for IE.
We will keep working with Adobe (the developers of Flash) so that ChessCube can run on the regular (and not debug) version of Flash and we'll keep you updated as things unfold.