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The Bootstrap 3 pull request has a lot of details about what is changing: https://github.com/twbs/bootstrap/pull/6342 https://github.com/twbs/bootstrap/pull/634

• WickyNilliams 13y ago
  Thanks, that's really comprehensive (perhaps too low-level for the end-consumer to care about). Reading through that PR it seems they are actually using percentage-based grids now, but the grid containers are fixed width (and probably defined in px). That's definitely better than completely fixed width grids, though I'd much prefer having max-width on my containers instead of an absolute value, and relative values used throughout