theme not displaying correctly in IE

I validated it and besides a bunch of references to the youtube widget in the side bad specificly the autoplay these are the only items the validator found

Line 318, Column 23: document type does not allow element “style” here
<style type=”text/css”>

The element named above was found in a context where it is not allowed. This could mean that you have incorrectly nested elements — such as a “style” element in the “body” section instead of inside “head” — or two elements that overlap (which is not allowed).
One common cause for this error is the use of XHTML syntax in HTML documents. Due to HTML’s rules of implicitly closed elements, this error can create cascading effects. For instance, using XHTML’s “self-closing” tags for “meta” and “link” in the “head” section of a HTML document may cause the parser to infer the end of the “head” section and the beginning of the “body” section (where “link” and “meta” are not allowed; hence the reported error).

1. Line 160, Column 9: XML Parsing Error: Opening and ending tag mismatch: a line 158 and center
2. </center>
3.
4. Line 162, Column 10: XML Parsing Error: Opening and ending tag mismatch: center line 158 and div
5. </div>
108. Line 391, Column 7: XML Parsing Error: Opening and ending tag mismatch: div line 62 and body
109. </body>
110.
111. Line 395, Column 7: XML Parsing Error: Opening and ending tag mismatch: body line 59 and html
112. </html>
113.
114. Line 395, Column 7: XML Parsing Error: Premature end of data in tag html line 3
115. </html>

Ok so i went threw the css and this is the only code that makes any difference. It makes no difference in IE but if i remove it the div slides down in all other browsers.
‘#content {
float: left !important;
width: 521px !important;
padding: 0px 17px 0 16px !important;
}’