Why can't I withdraw any BTC from MtGox? I have a balance of just 4 BTC at Mt Gox and when I try to withdraw them I get this message: Your account is currently pending review, please visit https://mtgox.com/forms/verification

What am I supposed to do about this?  Is anyone else having the same problem?

EDIT (cannot comment or answer my own question?): Yes I created the account using Tor, and their response says that's the reason.  @Stephen Gornick you are correct, the restriction is specified when creating the account.
When Mt. Gox initiates the demand for verification your account is essentially frozen for withdrawals until you send in the required identification (color photo ID and whatever else they want) and your account gets verified.

The instructions from the link you provided will clearly state what is needed.  

For example, it might state


  
  VALID Photo ID Proof (Identity card, license, passport,...)
  Residence Proof (utility bill, tax return, insurance,...)
  ISSUED WITHIN 6 MONTHS
  


For the color photo ID, even a pic of the ID taken with a phone is usually sufficient.