This has happened to me more times than I can count now and frankly I'm sick of it because it's embarassing.
Symptom:
When typing a reply to a forum post, the autosave will actually POST message(s) as one is typing. This results in a whole page of unintended separate replies, usually with partially formed words in progress.
Possible cause:
I haven't put a sniffer on this yet, but I believe this may be caused by using the same form action for autosave and posting, and the hidden <input> which indicates autosave was truncated in the original request. (These vars may include cryptic things like __VIEWSTATEACTION et al, and in my experience this one is usually at the end of the <form>, which would definitely cause this behaviour.)
To recreate:
Eliminate vars from the autosave post data starting from the end and witness new posts being made.
Solution:
Option 1. Use a different URL for autosave
Option 2. Move the critical hidden input above the form input so if the page is truncated, it is obvious to the user.
Thank you.
