Button group glitches inside table

Created by: lw

Using a button group inside a table cell causes its borders to glitch a little. See this fiddle and note the corners (no radius!) and the shared edge. It seems to be caused by the border-collapse inherited from the table, as forcing it to be separate fixes the issue (see this other fiddle).

I had to copy the whole Bootstrap 3 CSS as I couldn't find a way to import it. I'm seeing this bug with the current 3.0.0-wip tip, using the latest Chromium on Linux.

EDIT: it happens only with justified button groups.