Can't send transactions / weird "send all" balance

[CC23]

I'm trying to send a bitcoin transaction. No matter if I do it from "all accounts" or from a specific input, when I enter my password to send I get a dialog box containing a warning sign and the number 0. I click "okay" and nothing happens.

Furthermore, when I type "!" to send all of my coins (only for "all accounts"), the Amount field autofills with double the actual balance. I haven't tried to send it yet.

Edit: sorry.. Electrum 2.0 on Gentoo Linux.

[CC23]

Hi everyone. I unchecked "show transaction before broadcast" and everything has gone to normal, I just successfully got my payment through. So there may be a bug with this option..