[TYPO3] Upgrade to 4.2.1 problems

[Ralica Sotirova]

Hi all!
Have problems with upgrade from TYPO3 4.1.1 to 4.2.1.( in BE)
1. Clear cache & search buttons don't work.
2. On page tree, left click dont work ( so I can't get a menu)
3. Pagetree and page content frames are fixed height, so I can't see all
elements ( http://itsbg.net/frames.jpg)
4. When I edit anything, and press "Save", I see an error saying I'm not
logged in , do I want to log again. If I say "Cancel", the content IS saved.
5. I suppose that this JavaScript Errors are the problem:
        uncaught exception: script.aculo.us requires the Prototype
JavaScript framework >= 1.6.0
        Prototype.Browser has no properties
        TYPO3ModuleMenu has no properties
        document.viewport has no properties
( in typo3/contrib/prototype/prototype.js :  Version: '1.6.0.2')


What I did:
1. Untar typo3_src-4.2.1.tar.gz
2. Recreate links:
        index.php -> ../typo3_src-4.2.1/index.php
        t3lib -> ../typo3_src-4.2.1/t3lib/
        typo3 -> ../typo3_src-4.2.1/typo3/
        typo3_src -> ../typo3_src-4.2.1/
3. Admin tools -> Install -> Database Analyzer -> COMPARE -> Write to DB
4. Admin tools -> Check DB -> Update reference index -> Update now -----
Index Integrity was perfect!
5. Checked that zend.ze1_compatibility_mode = Off in php.ini
6. Don't see any errors in server log. In localconf.php turned on php
errors, but no errors displayed.

The server is CentOS 5.2.

Thanks,
Larry