vcut produces Ogg files with Negative granulepos (-1) on vorbis stream outside of headers.
Running ogginfo on an output file created by vcut presents the error:
Negative or zero granulepos (-1) on vorbis stream outside of headers. This file was created by a buggy encoder whereas running ogginfo on the source Ogg file does not present the error, but does produce the warning
Warning: sequence number gap in stream 1. Got page 171463 when expecting page 3.
The source file was a captured radio stream with time stamps that begin much >0:00. If there is interest, I can try to create another smaller sample file which can be used to recreate the error.