Google Chrome: Vertical scrollbar disappears on some web pages, maybe due to a strange toolbar

Issue

One of my customers have trouble viewing some of the pages on our website. Specifically it is the vertical scrollbar, that disappears on some pages.

She is using Google Chrome, and as the following screenshots will show, Chrome also has a strange toolbar.

On this first image, there are no problem with scrolling

http://i45.tinypic.com/3444bqe.png

On the next, the scrollbar has disappeared although there is plenty of content on the page.

http://i47.tinypic.com/125qdlv.png

I have tried to reproduce the error on my own machine with the same Chrome version, but it was not possible. So I suspect the strange toolbar to be the culprit.

Does anybody know which extension gives this bar?

Solution

Turning the scrollbar always on did the trick for me:

body {
  overflow-y: scroll;
}

Answered By - Carsten Gehling