diff --git a/Changelog.md b/Changelog.md
index f10e29e..fce80a9 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,6 +1,6 @@
 #### 2.2 (master/beta)
-- Support for vertically centered slides via the ```center``` config option
-- Additional media queries (incl vertical) to support smaller screens
+- Support for vertically centered slides via the ```center``` config option. Note that the new default vertical centering option will break compatibility with slides that were using transitions with backgrounds (`cube` and `page`). To restore the previous behavior, set `center` to `false`.
+- Additional media queries (incl. vertical) to support smaller screens
 - When available, slide ID's are written to the URL hash instead of /h/v index
 - Support for multiple control elements (see https://github.com/hakimel/reveal.js#internal-links)
 - Fix bug which prevented fragments from being stepped through with the up/down arrows
@@ -15,7 +15,7 @@
 #### 2.1 ([download](https://github.com/downloads/hakimel/reveal.js/reveal.js-2.1.zip)) - 10-11-2012
 - Primary styles moved from main.css to reveal.css
 - The 'progress' and 'controls' DOM elements are now created via JavaScript if they don't exist in the presentation HTML
-- Added 'paused' mode which be reached by pressing b or .
+- Added 'paused' mode which be reached by pressing `b` or `.`
 - Added 'zoom' transition
 - Improvements to touch interaction
 - Updates to navigation API naming ([470cabaea](https://github.com/hakimel/reveal.js/commit/470cabaea81626b9983923cbe59bc6bbc673a169))