CMedia has new drivers on their site.
Here is the newest WDM drivers: (8/28/01)
ftp://210.59.227.41/8x38/WDM/CMI8738_WDM_0627.zip
Here is the newest VXD drivers: (8/24/01)
ftp://210.59.227.41/8x38/95-98-ME/CMI8738_WIN9X_1096.zip
I haven't checked the VXD drivers, but the WDM drivers finally have a slightly new mixer.