Close Virtual Machine randomly appearing

[louis]

I am running VB 3.1.4 in OSX 10.6.2 although this issue has appeared on earlier versions. At times when I start a guest, the Close Virtual Machine dialog box pops up when it first tries to run a guest. After I hit cancel the guest boots normally. It doesn't seem to happen every time and seems to happen more often if I had opened another guset first, shut that one down, and start a different guest. It doesn't seem to matter whether I was running a Windows guest or a Linux guest. Doesn't seem to matter which I try to start. And as I said, it seems random although I suppose one of the guests on shutdown is doing something untoward on shutdown that leaves VB in a strange state.

I included the last guest log file.