Guys,

Thanks for that. From the articles it was not made clear it was on only just one exchange. The text from the website http://blogs.computerworld.com/18504/can_geeks_save_bitcoin_after_hellish_week_of_hack_heist_trojan_and_a_crash was;

The value of the virtual money crashed from $17.50 per bitcoin to almost nill - mere pennies. MtGox was shut down before operators rolled back the fraudulent transactions and restored bitcoin value to $17.50.

So my concerns were;
How did they manage to 'rollback fraudulent transactions' when they went outside the exchange or were those not?
'restored bitcoin value to $17.50' sounds a bit like manipulation to me.

Thank you realnowhereman for explaining the story a zillion times better than the hacks at that web site.

It makes a bit difference to people and they need to understand it.

I'll still be keeping away from Mt.Gox as much as possible anyway for having such mickey mouse security for what is in reality a bank.

I feel much better now about the whole thing.

Regards