Same issue here. Don't even have to connect to any site, simply open and close the application and the crash message is encountered. While working on a server, there does not appear to be any immediate issue -- only when shutting down.
Here's what I've been able to gather.
AppName: winscp.exe AppVer: 4.1.2.388 ModName: winscp.exe
ModVer: 4.1.2.388 Offset: 00245ed4
<?xml version="1.0" encoding="UTF-16"?>
<DATABASE>
<EXE NAME="WinSCP.exe" FILTER="GRABMI_FILTER_PRIVACY">
<MATCHING_FILE NAME="DragExt.dll" SIZE="71680" CHECKSUM="0x2FA3D8E2" BIN_FILE_VERSION="1.1.5.65" BIN_PRODUCT_VERSION="1.1.5.65" PRODUCT_VERSION="3.8.0.0" FILE_DESCRIPTION="Drag&Drop shell extension for WinSCP" COMPANY_NAME="Martin Prikryl" PRODUCT_NAME="WinSCP" FILE_VERSION="1.1.5.65" ORIGINAL_FILENAME="dragext.dll" INTERNAL_NAME="dragext" LEGAL_COPYRIGHT="(c) 2004-2005 Martin Prikryl" VERFILEDATEHI="0x0" VERFILEDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0x0" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="1.1.5.65" UPTO_BIN_PRODUCT_VERSION="1.1.5.65" LINK_DATE="12/20/2005 20:03:41" UPTO_LINK_DATE="12/20/2005 20:03:41" VER_LANGUAGE="English (United States) [0x409]" />
<MATCHING_FILE NAME="unins000.exe" SIZE="683874" CHECKSUM="0xBD165E83" BIN_FILE_VERSION="51.46.0.0" BIN_PRODUCT_VERSION="51.46.0.0" PRODUCT_VERSION="0.0.0.0" FILE_DESCRIPTION="Setup/Uninstall" COMPANY_NAME="" PRODUCT_NAME="Inno Setup" FILE_VERSION="51.46.0.0" ORIGINAL_FILENAME="" INTERNAL_NAME="" LEGAL_COPYRIGHT="Copyright (C) 1997-2007 Jordan Russell. Portions Copyright (C) 2000-2007 Martijn Laan." VERFILEDATEHI="0x0" VERFILEDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x1" MODULE_TYPE="WIN32" PE_CHECKSUM="0x0" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="51.46.0.0" UPTO_BIN_PRODUCT_VERSION="51.46.0.0" LINK_DATE="06/19/1992 22:22:17" UPTO_LINK_DATE="06/19/1992 22:22:17" VER_LANGUAGE="English (United States) [0x409]" />
<MATCHING_FILE NAME="WinSCP.exe" SIZE="1300480" CHECKSUM="0x8B1E6A86" BIN_FILE_VERSION="4.1.2.388" BIN_PRODUCT_VERSION="4.1.2.388" PRODUCT_VERSION="4.1.2.0" FILE_DESCRIPTION="SFTP, FTP and SCP client" COMPANY_NAME="Martin Prikryl" PRODUCT_NAME="WinSCP" FILE_VERSION="4.1.2.388" ORIGINAL_FILENAME="winscp412.exe" INTERNAL_NAME="winscp" LEGAL_COPYRIGHT="(c) 2000-2008 Martin Prikryl" VERFILEDATEHI="0x0" VERFILEDATELO="0x0" VERFILEOS="0x4" VERFILETYPE="0x1" MODULE_TYPE="WIN32" PE_CHECKSUM="0x0" LINKER_VERSION="0x0" UPTO_BIN_FILE_VERSION="4.1.2.388" UPTO_BIN_PRODUCT_VERSION="4.1.2.388" LINK_DATE="05/09/2008 20:25:05" UPTO_LINK_DATE="05/09/2008 20:25:05" VER_LANGUAGE="English (United States) [0x409]" />
</EXE>
<EXE NAME="kernel32.dll" FILTER="GRABMI_FILTER_THISFILEONLY">
<MATCHING_FILE NAME="kernel32.dll" SIZE="984576" CHECKSUM="0xF0B331F6" BIN_FILE_VERSION="5.1.2600.3119" BIN_PRODUCT_VERSION="5.1.2600.3119" PRODUCT_VERSION="5.1.2600.3119" FILE_DESCRIPTION="Windows NT BASE API Client DLL" COMPANY_NAME="Microsoft Corporation" PRODUCT_NAME="Microsoft® Windows® Operating System" FILE_VERSION="5.1.2600.3119 (xpsp_sp2_gdr.070416-1301)" ORIGINAL_FILENAME="kernel32" INTERNAL_NAME="kernel32" LEGAL_COPYRIGHT="© Microsoft Corporation. All rights reserved." VERFILEDATEHI="0x0" VERFILEDATELO="0x0" VERFILEOS="0x40004" VERFILETYPE="0x2" MODULE_TYPE="WIN32" PE_CHECKSUM="0xF9293" LINKER_VERSION="0x50001" UPTO_BIN_FILE_VERSION="5.1.2600.3119" UPTO_BIN_PRODUCT_VERSION="5.1.2600.3119" LINK_DATE="04/16/2007 15:52:53" UPTO_LINK_DATE="04/16/2007 15:52:53" VER_LANGUAGE="English (United States) [0x409]" />
</EXE>
</DATABASE>