Quote:
Originally Posted by Rev. Bob
While I agree with the rest of your message, I have to point out that "em" does not belong on that list, being a relative rather than absolute unit. It's still a good rule of thumb to say "no units on line-height," but ems should be okay due to their relative nature.
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I've had occasional issues when using em as the unit has caused issues with inheritance where the inherited line height seems to be applied as if the font size did not change. Personally, I think this is the result of poor programming but its led me to avoid the use of any units in line-height statements.
edit: Just read tshering's comment and it fits with what I've seen.
Regards,
David