Don't. Leave. Money. In. Exchange. Accounts.
Having your account breached and password changed mid-trading session really makes it hard to withdraw funds. 4 out of 5 doctors agree.
If you can come up with a creative way to initiate a withdrawal after your account has been breached/changed you would be a septillionaire.
On another note I started a unifying thread for this:
https://bitcointalk.org/index.php?topic=173354.0Everyone who has posted about their account being hacked, please atleast copy your post to the thread phr0stbyt3 created so we can have a compiled list of all accounts affected, for people to see.