I've searched the forum, no suggestions working there. I have other websites hosted with a max file size of 512MB set in php.ini and other places and that works fine, it just suddenly stopped working on XF. I watch and see it uploads a 128MB test file, but then produces the error. Execution time, php and apache limits are all set correctly. Any ideas why it would suddenly stop working on XF? Piers Code: Uploaded 132268032/134217728 bytes. attachment_editor.js:14 Uploaded 132972544/134217728 bytes. attachment_editor.js:14 Uploaded 133644288/134217728 bytes. attachment_editor.js:14 Uploaded 134218748/134217728 bytes. attachment_editor.js:14 XenForo.activate( [div.xenOverlay __XenForoActivator, constructor: function, init: function, selector: "", jquery: "1.5.2", size: function…] ) xenforo.js:191 AttachmentUploadError: d.Event attachment_editor.js:15 All files uploaded.