---
title: Compass History
crumb: CHANGELOG
body_id: changelog
layout: default
---
COMPASS CHANGELOG
=================
Upgrading compass is pretty easy.
Don't let all these details [scare you...](/help/tutorials/upgrading/im-scared/)
The Documentation for the [latest stable release](http://compass-style.org/docs/):
The Documentation for the [latest preview release](http://beta.compass-style.org/)
0.13.alpha.0 (UNRELEASED)
-------------------------
* Allow numeric sprite names when not using sprite selector generation capability.
0.12.2 (UNRELEASED)
-------------------
* [Vertical Rhythm Module] Removed the `$ie-font-ratio` constatnt in
favor of a more clear `$browser-default-font-size` constant.
* [Vertical Rhythm Module] The `establish-baseline` mixin now styles the
`` element instead of the `
` element. This makes the
vertical rhythm module work better with `rem` based measurements.
0.12.1 (03/14/2012)
-------------------
* Fixed a bug in font-files mime-type detection.
* Code cleanup and better documentation for the vertical-rhythm module.
* Add support for installing compass on Macs using a [one-click installer](https://github.com/chriseppstein/compass/downloads).
0.12.rc.2 (03/11/2012)
----------------------
### Stylesheet Changes
* Improved [hide-text mixin](/reference/compass/typography/text/replacement/#mixin-hide-text) for better performance and accessibility.
* Added [squish-text mixin](/reference/compass/typography/text/replacement/#mixin-squish-text) to hide text on inline elements.
* Compass css3 transitions module now correctly handled transitioning of
prefixed properties.
### Misc Changes
* Fix the mime-type of embedded `woff` font files. Add support for Embedded OpenType fonts.
* New math functions are now available: `e()`, `logarithm($number[, $base = e()])`, `square-root($number)`
and `pow($number, $exponent)`
0.12.rc.1 (02/02/2012)
----------------------
Give warnings for users who upgrade without knowing about the compass-rails gem.
0.12.rc.0 (01/31/2012)
----------------------
### Stylesheet Changes
* Removed -ms prefix from box-sizing
* Added sprite_names sass function
* Added -ms prefix to transitions
### Command Line
* Added support for `--debug-info` and `--no-debug-info` to the compass compile command
### Rails Integration
Rails projects must now use the [`compass-rails`](https://github.com/compass/compass-rails)
gem to integrate with compass. Please read the [README](https://github.com/Compass/compass-rails/blob/master/README.md) for upgrade instructions. More information in this [blog post](/blog/2012/01/29/compass-and-rails-integration/).
0.12.alpha.3 (12/23/2011)
-------------------------
* The `$round-to-nearest-half-line` config variable was added. When
true, the vertical rhythm module will round line heights to the
nearest half-line to avoid awkwardly large gaps between lines of text.
Defaults to false.
* Added `reset-baseline` to the vertical rhythm module so you can force the baseline to reset.
* Merges in the stable changes between 0.11.5 and 0.11.6.
0.12.alpha.2 (11/28/2011)
-------------------------
* Bug fixes for Rails 2.x applications.
0.12.alpha.1 (11/14/2011)
-------------------------
* font-files helper: Stop requiring font type when the type can be guessed from URL
* inline-font-files: actually works now
* Upgrade CSS3 Pie to 1.0beta5
* log sprite generation and removal to the console
* Added a new helper function `compass-env()` that returns the current compass environment (development, production)
* Added the ability to inline a sprite image by setting `$