Testing mobile Safari problems. Signed in but not able to Quick Reply, Preview, New Thread, Add Comment. Text in Quick Reply does not copy to Full Edit page. Copied text in Full Edit page cannot be Previewed and disappears if Preview is attempted.
Changed several Settings on iPad and can now Post from Quick Reply. Can also Preview from Full Edit and from Modify from thread view.
Of course, it seems to now works and I did not (could not) write/note what I changed!