Comment #5 on issue 2585 by [email protected]: current po breaks GUB http://code.google.com/p/lilypond/issues/detail?id=2585
Don't touch po/cs.po manually. Get in touch with the translator team, I guess?
To totally nuke your GUB build, do rm -rf uploads rm -rf targetthat'll rebuild absolutely everything. To only remove the lilypond stuff, do
rm -rf $GUB_DIR/target/*/*/lilypond*
