IE6 Erase value of textfield

When in the source code you type :

<input type="text" value="10">

go to the view and then go back to code, the result is :

<input/>

Where did the value go ????? I also noticed that all <script> tags are erased and other bugs ...

What is going on with IE ? Is there a way to avoid IE to modify the code ?

Thanx guys ;-0