TYPO3 Core

After installing typo3 from introductionpackage-4.5.0.tar.gz the following page shows invalid content:
.../examples/file-downloads/

Instead of showing several icons/links etc the page shows the the text of the HTML code for the download links. For example (this is a copy paste from my page as seen in the browser): ========================================
Download no icon, no filesize
<a href="examples/file-downloads/?jumpurl=uploads%2Fmedia%2FTYPO3_Logo_Guide_v3.pdf&amp;juSecure=1&amp;mimeType=application%2Fpdf&amp;locationData=35%3Att_content%3A114&amp;juHash=7662677e4f1cc1a4871cface4904dcf3969ef221" >TYPO3_Logo_Guide_v3.pdf</a>

Download with icon, no filesize
<a href="examples/file-downloads/?jumpurl=uploads%2Fmedia%2FTYPO3_Logo_Guide_v3_01.pdf&amp;juSecure=1&amp;mimeType=application%2Fpdf&amp;locationData=35%3Att_content%3A113&amp;juHash=817c69adb3872d6c9389d7943cf073617af03eee" ><img src="typo3/sysext/cms/tslib/media/fileicons/pdf.gif" width="18" height="16" border="0" alt="" /></a> ========================================

I tried editing the page contents and deleting one of the downloadable files (the last one) and the adding it again, which did not solve the problem. By the way - it seems that the location of the file to download was specified wrong in the link...

To whoever will be fixing this:

Problem can be seen at http://smartclickads.com/examples/file-downloads/
I don't know how long I will keep this sample site on so please comment on this issue if you want me to keep it running so you can examine and fix the problem... Also I can give you the admin passw if you need it...
(issue imported from #M17537)