Visual Studio, no sound with /MT and /MD options?

With VS2005 and 2008 on Juce tip, there’s some nice new things like DirectSound I/O, but I also now get higher CPU load and transient peaks in /MTd and /Mdd modes. While I can build and open the app in release mode, there’s no sound. In debug mode, the _DEBUG and NDEBUG preprocessor flags in either direction work fine. Are there any suggestions how I could get sound output with /MT or /MD enabled?

…not a code problem. Windows had updated the IDE with a new service pack, and I had disabled the redistributables for it while trying to get Sonar working. I Just had to re-enable the distributables.