It seems that a common issue with Moodle is that often submissions people try to send just gets lost somehow.
There are legitimate reasons for this, such as deadlines for submisions passing by (even in these situations I think students should be capable of at least saving what they have produced for themselves).
Sometimes, there are cases however that for various reasons things just get lost, causing wild frustration towards Moodle and even towards computers in general.
Do you have any stories to tell about when things went terribly wrong, or perhaps when Moodle seemed more reliable than you expected? Please share. The developers would like to understand issues different users have with Moodle, better.
If you wish, you can reply here or in this related forum thread.