Ridiculous... The moments when rates were on a rollecoaster mode "15 -> 19 -> 14 -> 20 ->16 etc", I was not allowed to sell or buy...

Sure, it can be a problem with the SQL server, but you could see some selling 10s and 100s of bitcoins at the time, only to buy them back cheaper 10 seconds later!

Ridiculous... cashing out from Mt Gox and moving to another exchange site...