Java Html generation encoed newlines correctly

Hello,
I am generating an html string with some java code, and for some reason the newlines are's kept or encoded correctly. I tried using "\n" at the end of my lines, and I even tried using :
final String newLine = System.getProperty("line.separator");with no luck. I am using a StringBuffer to create the html page, one line at a time with the append(String) method. I tried writing it (the html file) using the UTF-8 encoding and made sure my html declaired it uses the same encoding, doesn't work. This wouldn't bother me much but when I try to validate the HTML using the w3 validator it has problems with the page, like not detecting the Doctype even though there is one, and I beleive this is why I get other strange errors. Firefox does detect the correct encoding, but when I look at the source using Firefox and IE I have no newlines.
Does anyone have any ideas?
Thanks!

Sure, here are parts (the whole thing is too long) :
      StringBuffer htmlText = new StringBuffer();
      htmlText.append("<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n");
      htmlText.append("<html>\n");
      htmlText.append(" <head>\n");
      htmlText.append("    <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n");
      htmlText.append("    \n");
      htmlText.append("    <TITLE>" + getHtmlTitle() + "</TITLE>\n");
      // CSS
      htmlText.append(getCss().toHtml());
      htmlText.append(" </head>\n");
      // More html code...
      String html = htmlText.toString();
      try {
         BufferedReader in = new BufferedReader(new StringReader(html));
         BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(TMP_WORKING_DIRECTORY_ROOT_DIR +
               File.separator + filename), "UTF8"));
         String thisLine = "";
         while ((thisLine = in.readLine()) != null)
            out.write(thisLine);
         out.flush();
         out.close();
         in.close();
      } catch (IOException e) {
         log.writeToLog(SendPanel.class, "Writing html file failed!");
         e.printStackTrace();
      }could it be that my in.readLine() strips the newline/EOL char?

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