[BruceZ]

Others have mentioned the back button deleting posts, but even worse, posts are "expiring" if you simply take too long to complete the creation of the post. Then when you hit the post key, you get the white screen of death, and all of your hard work is lost. I have experienced this myself, as well as having received complaints about it. I put a sticky warning about this in the probability forum (where posts containing long calculations are common) and I suggest that others do the same until this is fixed. This needs to be fixed post haste, as it will simply discourage the best posters from making valuable contributions.