For the past few days some of our users have been suffering from Bitcoin Withdrawal delays where transactions could be stuck for several hours or days.
Please rest assured that this is only affecting a limited number of users and transactions, and that we are working hard on resolving this problem as soon as possible.
We ask for your patience and understanding as we work to resolve this issue and will continue to update you on this matter as the situation evolves.
Thank you for your continuous support.
Best regards,
MtGox Team
https://www.mtgox.com