id summary reporter owner description type status component version resolution keywords cc guest host 8086 VirtualBox crashes intermittently when moving windows in seamless mode Michael "It seems to happen to me about once a week or so. I'll be moving a window in seamless mode and the virtual machine just freezes. Video output will show a corrupted image and everything halted. A reboot of the machine fixed the issue. This was happening both before upgrading to VirtualBox 4.0 as well as after. However, it seems to happen a bit more running VirtualBox 4.0. Host: Windows 7 Client: Ubuntu 10.10 (Fresh install yesterday)" defect closed other VirtualBox 4.0.0 fixed Linux Windows