>the rule was that once something was frozen and defrosted, it couldn't
>be refrozen.

If it's been cooked properly, it's safe.

Freezing and thawing can change textures. I've tried to freeze potato
soup, and when it thaws, the potatoes are grainy, and break down.

I've also heard that once you thaw raw meat/poultry, you're not
supposed to refreeze it. But again, I think this is a texture/taste
issue.