Can't Drag Overlay Scroll-bar to Top on Long Files

In multiple graphical text editors I'm often experiencing difficulty using the Overlay Scroll-bar to drag-scroll to the very top of the document.

I will click-grab-drag the overlay scrollbar all the way to its top-most position and then still be about 1/3 of the way from the very top of the text document.

I'm noticing this unwanted behavior mainly on text files that have over 700 lines. And I've experience it, so far, in both gedit and geany.

This may have nothing to do with it, but I will inform you that I am a big fan of Ubuntu 14.04's scaling features. While running my laptop's monitor at it highest resolution (1920 x 1080), I scale my screen larger (1.12), using the settings that can be found here:
System Settings > Displays > Scale for Menus and Titlebars

Additionally, I use large fonts, which can be found here:
System Settings > Universal Access > Large Text > On

As I said, these "scaling and large font" settings may be unrelated to this issue, but I'm mentioning it just in case.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: overlay-scrollbar 0.2.16+r359+14.04.20131129-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
Uname: Linux 3.13.0-34-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Aug 18 19:37:11 2014
InstallationDate: Installed on 2014-07-30 (19 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
SourcePackage: overlay-scrollbar
UpgradeStatus: No upgrade log present (probably fresh install)