Please provide an updated ebuild for groupoffice. Ebuild in portage is really old (2.18.6). Reproducible: Always
Actual stable groupoffice is 3.7.51 and 4.0 is in beta state.
I've committed 3.7.52 and 4.0.47 to the tree. As I don't use groupoffice (looks nice, tho!), please give 'em a testdrive and report errors where you find them :)