(http://i.imgur.com/TZImTFl.png)
As seen in the image, the coloured lines showing the colonist and prisoner count do not match up with the gray lines denoting the Y axis. I estimate the line to be about 5 colonists, but a mouse-over reveals 6. When I had 5 colonists, the graph displays about 4.3 colonists. If this is a reflection of their value as a productive member of the colony, touché.
Additional to that, the history tab shows 8 enemy raids but the statistics tab shows about double that. I suspect Sieges/Sappers/Infestations aren't a part of it, and I assume the crashed ships aren't shown either. This despite being counted as major threats/raids in the statistics tab.
The numbers are rounded. I'd say it's a bug, but low priority for now.
It is a bug, but a low priority, yes.
bump
Moved to Mantis, thanks very much.