What does IE browser do when the slug value in the request header has special characters?

Hi ,

I would like to know how does IE browser handle slug if the value field has certain special characters.

For example if the slug header has special characters while posting the http request (say "äøéëåæ")

Then I see using http watch under the "Stream"tab , the slug value is getting converted to a  different value(now the value for the above mentioned slug is " Ã¤Ã¸Ã©Ã«Ã¥Ã")

Could someone please explain how does this happen in IE browser?

Thanks alot,

Neelaja