Myself and others it seems have come across instances where we see that someone has posted but the post appears blank And I am sure if they had edited it to delete the text you would still see a message saying "edited by..." 

It should be noted that it seems to happen random and not always on posts by the same people. If the site is eating our text, should we tell what posts and by who so that the admin can find the cause? After all some of my posts could be appearing invisible as well.

admin is supposed to reply to such posts as this. But maybe he´s

It might actually be better if you sent him a PM rather than posting in the forum.