id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
11268	Dual monitor setup on host: guest window rendering issues on 2nd monitor	VBoxer		"Configuration: 
Host: Mac OS X, 10.6 
Guests: Win7, Linux; each one configured with 1 guest monitor

Steps to reproduce:
1. Open a guest window on the 1st monitor.
2. Drag guest window to the 2nd monitor (if it fails at the first attempt, try again) 
3. Click somewhere on the 1st monitor.
 
Expected result:
Clicking on the first monitor has no impact to the guest window on the 2nd monitor.

Actual result: 
The guest window sometimes turns black. It is not redrawn automatically, only if the user moves the mouse or clicks somewhere in that window or moves some windows in the guests foreground.

It's always reproducible with Windows 7 guest, and almost always with Linux (LXDE desktop), with Guest Additions installed.
It's not reproducible on a Linux KDE desktop with no Guest Additions installed.

The vbox.log files don't contain any entries from the time the error occured. Let me know, if you need more information.
"	defect	closed	GUI	VirtualBox 4.2.4	obsolete			all	Mac OS X