A new version of app-office/glabels was released on 19th august 2008 with improvements and bug fixes. I was hit by upstream bug #2049431 (Explicitely set page size when printing -- don't let print back-end use a default size), which is fixed for 2.2.3 and works fine for me. Renaming the glabels-2.2.2.ebuild to glabels-2.2.3.ebuild worked for me. No problem encountered with 2.2.3 so far.
you're late, it's been in tree for a day or two already. :p