Timestretch not working on Sansa Fuze V2

[BB99]

I have latest build of Rockbox working fine on Sansa Fuze V2, but Timestretch feature isn't working.  I have it activated (and rebooted), but whenever I go to the Pitch screen and increase the playback speed for an audio file, the pitch increases and there is no way to reduce it back to normal.  Any suggestions?

Thanks,
BB