Bug in Forum Post Text - Width Property IE10

I have come across this before in 2.65
When I view this topic in IE10
https://www.nopcommerce.com/boards/t/22517/add-custom-image-to-insert-into-shoppingcartitem-table.aspx

the text does not fit inside the posttext area

I think this occurs when text is cut and pasted into the topic post.

To fix it I inserted max-width instead of width:100%
.forum-post-text,.bb-editor-text{width:100%;height:300px;}

Thanks. I'll have a look