With Quick Edit, a click on the Edit button in a post will open an editor within that post via AJAX if the visitor's browser is compatible. Users may use the full editor by clicking the 'Go Advanced' button in the inline editor. Perhaps you clicked on the Quote Reply button which is to the left of the quick reply. It will bring up the text of the message you are replying to with /Quote marks around it. By contrast, Quick reply should move you to the bottom of the screen and 'activate' the quick reply text box which turns white and becomes editable.
Try closing your browser (close all the webpages and the entire website). Then try again. If this is still a problem, send an email to support@askmags - be sure to include as much detail as possible. The more details we have the faster we can get your issue resolved.
The New Threads feature uses your last login time to judge whether the thread is new or not. Try using the QuickLinks "Mark Forums Read" button to set the status of all the forums to 'Read'. Then wait a while and see if you get open envelopes again.