sci-visualization/gnuplot-4.6.3 is out, please bump. Reproducible: Always
Already done: *gnuplot-4.6.3 (22 Apr 2013) 22 Apr 2013; Christoph Junghans <ottxor@gentoo.org> +files/gnuplot-4.6.3-eldoc.patch, +gnuplot-4.6.3.ebuild: version bump
So that's a FIXED bug, not an INVALID one.