Linux Mint 17.3
Broken: https://developer.blender.org/T47102 2.77 testbuild
'Use High Quality Fill' not present in UI.
Start a GP session, as per usual, and this option as described in T47102 doesn't show up. Looking forward to testing it.
This feature is not available in Blender yet. It's currently being reviewed in D1705.
Thanks for the report, but no bug here :)