Browser and CiviCRM contextual menu issues on search results page

In all browsers, if the user right-clicks on one of the bottom rows of the search results, the contextual menu is displayed below the bottom boundary of the browser, requiring the user to scroll the browser window down to access the choices. The contextual menu should be smart enough so that the bottom edge never goes below the bottom edge of the window. If you right-click the for the contextual menu in any of the browsers below at the bottom of the window, the bottom of the menu starts where the mouse cursor is (as opposed to the bottom of the window). See screenshot for this.

These errors occur in the search results page, whenever the user right-clicks on a record.

In Firefox:
Right-clicking on a record, then moving the mouse to a different location and right-clicking again will display both the CiviCRM and Firefox contextual menus (see screenshot).

In Google Chrome:
Right clicking on a record produces the browser's contextual menu every time. (it should suppress it)

In Opera:
The contextual menu works fine (browser's menu is suppressed). If the user right-clicks on one of the items on the CiviCRM contextual menu itself, the browser's contextual menu is shown.

In IE:
I couldn't even get to the search results due to a javascript error. Not sure why this is happening. Using Garland theme in Drupal.