Missing Scrollbars in Chrome and Safari

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Problem: I’m having trouble with the grading section of Blackboard, and I have tried this on two browsers (Chrome Version 29.0.1547.65 and Safari 6.0.5). It does seem to work fine on Firefox 3.16.13. What happens is this: when I open up the “full grading center” I am not allowed to scroll left or right within it; consequently I am not able to grade any assignments that are beyond the opening five columns that show up.  The horizontal scroll bar is missing.
Resolution/Workaround: This issue is due to OS X’s different settings for scrollbars starting with Lion. The workaround for Lion and Mountain Lion users is as follows:
  1. Launch System Preferences, either from the Dock or from the Apple menu.
  2. Once the System Preferences window opens, select the General preference pane.
  3. The middle section of the General preference pane controls when scroll bars appear and a few additional scroll bar options.
  4. To return the scroll bars to their pre-Lion functionality, select “Always” from the Show Scroll Bars options. The scroll bars will now always be visible, even when you’re not scrolling.