72M1 Driver Issue
 

Have a strange problem with latest driver using this configuration.
Dell Latitude E6230 Windows 7 64 bit connected to U3 Toshiba Dynadock.
Have found when using an external monitor connected to DVI on the Dynadock and set it to primary if I play a media file using Windows Media Player fullscreen on the laptop screen and then set laptop to sleep, when it wakes up I am no longer able to play any media files with Media Player (error is Windows Media Player encountered a problem while playing the file).
Have to restart for it to start working again.