> And we're using a capital G, ie the SI version.

Cool.  I probably did know that about `lvm` at one point in my life ;-/

> I pretty much doubt anyone really cares about +/- something of less than 1GB. Even in a virtualized setup.

Actually that's why I noticed this issue.  I set up a DRBD disk of 0.5GB because I'm trying not to waste precious disk space on my workstation, and now I can't use it for testing.