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Add note about decimal places for ems.

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1 parent e30a946 commit bfee3a67246026f88f3512ebc16e7686bed5f7b1 @bradwright bradwright committed Jul 11, 2012
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2 css.md
@@ -26,7 +26,7 @@
- Use comments to divide and clarify what groups of declarations are for
-- Dimensions: use ems
+- Dimensions: use ems to 2 decimal places to [support IE6 and 7](http://destination-code.blogspot.co.uk/2008/10/font-size-relative-length-unit-em.html)
- Use soft-tabs with a two space indent.

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