Thanks for replying. I started using Zorro a few versions back and for all of them I noticed similar behavior. The latest I used is 1.50.

I am running the instances on a hosted virtual machine, so it's actually a headless configuration (there is no physical display). The Windows version is Microsoft Windows Server 2003 R2, Standard Edition, Service Pack 2.

Currently I am trying 2 things to see if the problem stays: (1) Upgrading to 1.54 (unlikely to do anything as previous upgrades had the same issue); (2) Using TightVNC instead of Windows remote desktop (RDP).