outline in bad resolution when use other color than BLACK

[Renato S. Yamane]

When you use a text in a color different than BLACK, you can see an outline/contour in bad resolution.
Looks like the antialiasing is not in the same color of letters.
Check files attached.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: gimp 2.8.14-1ubuntu2.1
Uname: Linux 4.6.0-040600rc7-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Oct 5 17:39:05 2016
InstallationDate: Installed on 2014-03-08 (942 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140308)
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: gimp
UpgradeStatus: Upgraded to wily on 2016-01-15 (263 days ago)