I created a small mashup (ironically, using firefox) and everything was hunky dory in the preview mode i.e. the mashup is displayed just fine (in fx) but once I shared the mashup and navigated to the embeddable url on Firefox 2.0; all I see is the blank page though the mashup is displayed fine on IE 7.0. Does anyone know what might be causing this? Below is the url of the mashup for debugging purposes:

http://www.popfly.ms/users/sachiniscool/flickrTag.small

Thanks,
S