xml style doesn't generate valid xml

[Haszlakiewicz, Eric]

I'm continuing looking for ways to get structured, parseable data out of mercurial, this time I figured I'd try the xml style (vs. my other email about using a json style).

I noticed that the xml style doesn't work.  Specifically, it generates bad output for the "extra" info attached to a changeset if you do:

hg init x && cd x
echo foo > foo
hg add foo
hg ci -u user -m change1 foo
echo foo >> foo
hg ci -u user -m change2 foo
hg up -r0
echo bar > bar
hg add bar
hg ci -u user -m barchange
hg up -r1
hg --config "extensions.hgext.transplant=" transplant 2
hg log --debug --style xml > log.out
xmllint --noout log.out

Not only does this not produce valid utf-8 output, but any characters that are less than a byte value of 0x20 get replaced with a space, so I can't even fix it up with a custom parser.
Is anyone successfully using this style?  If so, how?

eric