I've never tried it before now, but I just lost my test post too.
To prevent people inadvertently losing posts, we've now removed the Save button.
If anyone wishes to compose a post over multiple sittings, I'd recommend following Mike's advice or even using the Microsoft Notepad (for PC users). I've actually done this in the past using the drafts folder of my e-mail account, but I'll admit, that doesn't seem to be the smartest approach.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)