i am running precise and this is not sorted out in a standard install yet, see the attached screenshot to see see that i cannot grab the slider and that scrolling with the mouse wheel results in visual corruption for the package explorer (not for the main text edit, though).
i am running precise and this is not sorted out in a standard install yet, see the attached screenshot to see see that i cannot grab the slider and that scrolling with the mouse wheel results in visual corruption for the package explorer (not for the main text edit, though).