[64 bit] Chrome - text select & display problem - zoom related

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http://ubuntuforums.org – In a text field you might place the cursor, and backspace over text, but the effects are not displayed - unless you zoom out or in (ctrl+ or -). You try to highlight text, but nothing is highlighted in the display. Yet, if you right click you are offered the option to search on the highlighted text. It doesn't happen all the time. Some months ago, I spent ages trying to configure a search for the solution, and eventually found it (something disabled or removed via Terminal) However, since the re-install, I have the problem again, though have totally failed to find the answer this t (Hardware)