New line character in IE9.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open index.html with IE9.
2. Input something include new line in textarea.

What is the expected output? What do you see instead?
Every new lines that were separated by <p> tag. It should be <br>.

What version of the product are you using? On what operating system?
0.5.1.

Please provide any additional information below.
I think it may not be a bug since what be inserted is depend on specified 
browser. I have tried by firefox and everything is it as I expect.However, it's 
not graceful ,and can you provide any resolution?

Original issue reported on code.google.com by [email protected] on 27 Apr 2012 at 9:49