Lightroom Beta 3: Screen went black..with only cursor displaying

[Michael West]

While using Lightroom 3 Beta my screen went completely albeit momentarily black ...displaying only the cursor .
 
This occured on my quad core MacPro
 
Anyone have any idea what I   could have done to make this happen?
 
Thank you

[joedecker]

While using Lightroom 3 Beta my screen went completely albeit momentarily black ...displaying only the cursor .
 
This occured on my quad core MacPro
 
Anyone have any idea what I   could have done to make this happen?
 
Thank you

One weak guess...

Loupe mode (the L key) blacks out everything except the current image, in some cases (particularly say in grid mode in the library) I could imagine that, if you'd hit the L key a couple times, it might have flickered the screen black without showing, or without showing in a way you noticed, the image that should have been visible on-screen.  

-j

[Michael West]

One weak guess...

Loupe mode (the L key) blacks out everything except the current image, in some cases (particularly say in grid mode in the library) I could imagine that, if you'd hit the L key a couple times, it might have flickered the screen black without showing, or without showing in a way you noticed, the image that should have been visible on-screen.  

-j

Thanks thats a distinct possibilty