Windows 8 WinSCP 5.1.1 internal editor problem

Always loads limited numer of lines. No problem with 4.x.x. It started with utf-8 suport. Any idea how to fix it?

Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.