To confirm correct results, I wrote a simple .wav analyzer that prints information about a wav file. It confirms that information in the header is correct and outputs the riff chunks. Use the -check option to see this.
This is called WavcutHHH so that it's clearly better than any existing program called Wavcut.
WavcutHHH will split a large .wav file into several files based on a text file that specifies cut points. wavcut.exe input.wav input.txt First line of the .txt file is 'wavcut'. Remaining lines of the .txt file should be numbers, specifying where to cut. Refer to wavcut.exe trombone.wav trombone.txt as an example. To check wav contents, use wavcut.exe -check input.wav
Here's what it looks like (these are ~800kb because of an example .wav):
On an unrelated note, I'm still in the midst of reorganizing my music library and moving to mp4. There are more hacks in the pipeline.