On every forum, Internet questionnaire, website comment, or anything you write on the Internet, always select everything you just wrote and copy it to the clipboard every time before:
- uploading, refreshing, or previewing;
- always preview before posting.
Now, specifically on EBT forum: if you stay for a long time writing or pausing without previewing, you will get the following message when you click the Preview button:
The submitted form was invalid. Try submitting again.
Just click Preview again and everything will be fine.