It's been confirmed that this is not problem in IE. Sorry I didn't mention that. Microsoft uses Silverlight: GET /index.php?page=Poem/Poem.php HTTP/1.1 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-ms-application, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-ms-xbap, application/x-shockwave-flash, application/x-silverlight, */* Accept-Language: en-au UA-CPU: x86 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 3.0.30618) Host: www.footprints-inthe-sand.com Connection: Keep-Alive It could either be because of what Sean said with the Range request or the Partial GET Request in Firefox. But I think you are probably correct Rolphin, as I've had a lot of Windows Media Player crashes recently. Either way, Windows Media Player should probably not be incorporated into Firefox if it's going to crash. A more stable platform should be used (such as Silverlight)