Currently (2.6 build566), for small pie views, if I click Tools and tick "Show Percentages" and "Show Values", the pie shows no numbers unless I hover over it, where it would show the percentage and value.
If I only click Tools and tick "Show Percentages", the percentages are shown in the pie, but when hovering over the pie, it would not show the values - only the percentage.
I think is useful to have an option allowing a combination of the above views; show the percentage on the pie and when the user hovers over it, show the percentage AND the value.
This is primarily a problem when we have small pie-charts.
Starting from tonight's release (2.6 b569) onwards Pie view tooltips will show both the value and the value as a percentage regardless of what option you have chosen from the Tools menu from the Pie view toolbar.