[TYPO3-mvc] Actions doesn't work anymore after System-Update

[Frank Niggemann]

Hi ...

I have an old Typo3 4.5 installation on an old Server with Ubuntu 12.04.

Now I got a new server with Debian 7.1 and installed the newest Apache-Modules and PHP 5.3 on it.

After that I copied the files and databases to the new server.

After a reboot first all seems to work fine. I can see all pages and all contents.

But then I saw, that not even one of the Extbase-Plugins in the Typo3-Backend works anymore. All plugins show me the indexAction and thats all. None of them show me any other page.

Then I tried to find the reason for that behavior and searched for hours.

The only thing, that I could find out is, that the parameters in the URL get lost on theyre way to the Backend-Plugin.

I added these lines in my code:
print_r($_SERVER);
print_r($_REQUEST);

Then I saw, that the parameters in the URL are shown in the $_SERVER-Variable but not in the $_REQUEST-Variable.

So the Plugin doesn't even know which action I want to see.

After hours of debugging I can't find the reason for that behavior. 

Does anyone have an idea?????