Here’s a quick tip – if you’re running IIS and use the SWFObject static method. IIS throws an error when you nest object tags. To workaround this you can put an empty asp tag in the start of the nested object tags like so: <<%%>object

Here’s more detail on that solution:

http://juicystudio.com/article/object-paranoia.php#update

And the full detail in the SWFObject docs:

http://code.google.com/p/swfobject/wiki/faq