jackmoore/autosize — pull request #13 by jaguar7021 (2012-06-29 11:51:51+00:00)
Title: bug: IE 8/9 not correctly calculated the size of textarea when entering ...

...text stream (without pressing Enter)

Most probably some of the styles in IE are not written as declared in the array "copyStyle". So copying styles used by .css(). jQuery smart, he decides to cross-browser situation.