Screen Blank on Opening SC?

Hi Folks - it seems that when I start Smart Client from developer and on our test server (only on my laptop - actually on several laptops we use for development) the screen stays blank with the exception of the Servoy Logo, until the screen is minimised and resized??

Has anyone else experienced this? Is there a work around for this or is it a challenge with Drivers etc?

does the console window of webstart tell you more?
Please enable that one and see if you get some exception when starting up a smart client from a server.

Or if you have the same on your developer, do you have any exceptions in the log file?