"Leave a comment" refuses to be translated

Hello HB team,

For the life of me I can’t figure out why I can’t get “Leave a comment” to be translated. I’ve got my WP install localized to pt_PT and have already translated various other aspects of the Aegaeus theme. I’m using the Codestyling localization program for translations. Also used poedit. Any ideas of why this bit of text isn’t budging?

Thanks so much, as always.

Dale