Only one Flash app on a page can run (Win7/IE10)

Apologies for the cross-post, but some advice I received in this thread (http://forums.adobe.com/message/5754324) indicated I'd have more luck perhaps trying in this forum. Here is the summary of the problem:

I've received reports from users of my website that they are having trouble playing content from more than one Flash application on the page at any one time. This seems to only be coming from users of IE10 on Windows7. So far I haven't been able to dig into the problem any more than at this general description level.

Unfortunately I don't yet have an example page to share with specific apps that trigger the condition, but one problematic page that has been reported is http://frasermaitland.com/index-2.html - there is a Flash banner at the top of the page as well as several audio players that use Flash to play audio. One one of these apps appear to be able to play audio at any one time.

In the other thread mentioned above it was mentioned in passing that some special IE tweaks might need to be made which confuses me but perhaps some Flex experts can expand on what this might be. Also if you know of any special sandboxing, concurrency, networking or shared object limitations that the Flash plugin might have on Windows 7 with IE10 that we can code around, that would be very helpful to know in case there is a workaround we can build into our app.