One of my client's sites seems to have broken over Xmas .... I just tried adding a new post and uploading an image - the image appears top upload but then displays the "broken" icon and can't be inserted into the post. I've tried upl;oading via the post and the Media Library. I'ver updated to latest WP version, updated all plugins, turned all plugins off and changed theme to Twenty Eleven, all to no avail. Hope someone can help!