As discussed recently, I have changed the zoom levels so that at 100%, one px unit is equal to one screen pixel. This change led to switching all internal calculations from a mix of px and pt to pure px. This simplified code in many places and got rid of lots of ugly 0.8 and 1.25 multipliers that were scattered throughout the codebase.
Correspondingly, the default template now uses the px units. I think that makes sense, given that most people use Inkscape for screen graphics. Now zoom to 100% (the `1' key) and you'll see your graphic exactly as it will look when exported with default resolution (now 90dpi, not 72dpi as before).
This is a pretty big change. I tested everything I touched, but I may have missed something. Please test thoroughly. All old files with saved zoom will now load at 1.25*zoom, but that's inevitable; if you see any other problems, please report here.