Comment 5 for bug 274661

John Watson (jwatson) wrote :

The Flash related uploading problem in Wordpress 2.6.x is caused by a change in Flash 10 made by Adobe. See http://trac.wordpress.org/ticket/6979

I'm experiencing this with Flickr.com and Vimeo. The browser UI goes grey and becomes unresponsive. BUT, the uploads do progress and eventually complete and when they do the browser comes back to life. For some reason the upload seems to be blocking the rest of the browser.