Re: pxref

[Richard M. Stallman]

    Specifically, in the new Info default, @xref does not always produce a
    capitalized "See".  This means a change in documentation.

It should always produce "See" _when used properly_.
That is, at the beginning of a sentence.

If you find an example when it does not produce "See"
when used properly, that is a bug, so please report it.

As for what happens when it is used improperly, that is
user error, not a bug.