Invalid access to memory

It seems to happen during graphically rendering the window. When I'm repeately clicking OK button, the "remote side panel" draws part by part - selected line column by column, file names, etc. each part after click.
WinSCP Version 4.3.0 (Build 1029), in that time 7 opened php files in notepad++ through WinSCP. Win XP, Intel VGA.
Until now it has happened only once or twice a month while using winSCP at least few hours each day.

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.