Inkscape 0.38.1 (bug fixes for .38) is out. Ebuild from 0.38 seems to work for me (~x86).
Yeah, simply needs a version bump. An accidental bug crept into 0.38. Renaming current ebuild to 0.38.1 works for me too.
Can close: http://packages.gentoo.org/ebuilds/?inkscape-0.38.1
in portage