SWF files published on a website repository like username.bitbucket.org cannot be loaded by Flash Player when they are embeded in an HTML wrapper (i.e using embed tag and swfobject) because they are served with header Content-Disposition:attachment

These repositories are those described by the following link : https://confluence.atlassian.com/display/BITBUCKET/Publishing+a+Website+on+Bitbucket

Flash Player cannot load SWF when Content-Disposition is attachment : http://www.adobe.com/devnet/flashplayer/articles/fplayer10_security_changes.html#head32

If possible : Please set Content-Disposition:inline for SWF files (Only for those kind of repositories i.e published website on Bitbucket)

Other people have the same problem but for other file types (PDF) : https://bitbucket.org/site/master/issue/5699/