Freeciv

if (preq->present) {
cat_snprintf(buf, bufsz,
_("The squared distance between the tiles "
"must be at most %d."),
preq->source.value.distance_sq);
} else {
cat_snprintf(buf, bufsz,
_("The squared distance between the tiles "
"must be at least %d."),
preq->source.value.distance_sq + 1);
}

I don't know which part is wrong, but this is inconsistent. The exact value can't fulfill both "present" and "not present" case. So either one should be "less than", or the other "more than".