Hold 'Em for Vista Ultimate graphical issue

Hi,

Just started using Vista Ultimate and have found that Hold Em has flashing
text. My system is Nvidia 8800GTS with the latest 'official' beta (released
today) from Nvidia. has anyone else encountered this problem? There doesn't
seem to be any relevant setting in the settings of the game which allow me to
control this.

I wonder if this a DirectX10 specific issue, or if other users are
experiencing it too.

All the grpahics appear as normal, it's just the text on the buttons and on
the players that constantly blink on and off, making the game unplayble