Vista - Hold 'em Sounds Causing Memory Leak in audiodb.exe

After playing with Hold'em for about one hour, I noticed that my memory was
above 50%, with nothing else running. Task Manager showed that audiodg.exe
was consuming 1,022,522 K (1GB) of memory. After rebooting it settled back
down around 9,600 K. I started the Hold'em game again, with the Task
Manager window still open and showing Processes. It seems that every time a
sound is played from this game, audiodg.exe memory is increased. Stopping
the game never frees up this memory. And it seems to only happen with that
game, as the other included games are not having this problem.

Realtek HD Audio Driver Version: 6.0.1.5306 on Asus P5W DH Deluxe
motherboard.
DirectX Version: 10.0
Hold'em Version: 6.0 (build 6000)

JimB