I couldn't cancel open orders for about 30 minutes either. Freaking put my sell order in at $43 and it wasn't executed till $38..... fuck you very much gox! lol
Yea it's BS, It's like they saw the price starting to tank and tried to stop people from selling, I think i might be going back to campBX after this, Mt.gox is to finicky and they have caused me to loose about $50.