got a problem with GS3.0 - cannot save an empty page???

[yojoe]

Try creating manually a test page.
Make a .txt file, rename its extension to xml, edit it and paste below content

Code:

<?xml version="1.0" encoding="UTF-8"?>
<item><pubDate>Mon, 11 Apr 2011 01:01:01 +0100</pubDate><title><![CDATA[testpage]]></title><url><![CDATA[testpage]]></url><meta><![CDATA[]]></meta><metad><![CDATA[]]></metad><menu><![CDATA[testpage]]></menu><menuOrder><![CDATA[5]]></menuOrder><menuStatus><![CDATA[Y]]></menuStatus><template><![CDATA[template.php]]></template><parent><![CDATA[]]></parent><content><![CDATA[testpage]]></content><private><![CDATA[]]></private><sidebar><![CDATA[]]></sidebar></item>

After you save it, upload it to /data/pages directory, go to pages page in your admin panel and see if a page named "testpage" appears, and you can edit it.
Supposing yes, it will give a hint, that there are problems with file creation permissions or file owner.

Tell me exact steps you take to install GS right after you download GS archive.