moo's questions

I am using Oracle VirtualBox 4 on CentOS 6 to host some virtual machines. When I am doing a command line export:

VboxManage export <VM> -o /path/outputfile.ova

and there is lack of space on the target disk then that VM becomes unusable. It can't be started or stopped or whatever until the whole machine is restarted. Is there solution to avoid system restart?

When MS Outlook (2003/2007/2010) connect to pop3-ssl server and the server certificate is selfsigned it opens a dialog whether or not user wants to accept it. Is it possible to suppress this message like it is with Thunderbird?