[TYPO3-english] "alt_doc.php" not found, when creating New user

[Ulrich Fischer]

Hi Markus,

in my case, an error 404 occurred every time I wanted to add an image in the 
backend. www.domain.com/typo3/ajax.php?parameters ... not found.
A direct call of www.domain.com/typo3/ajax.php?parameters was successful.

.htaccess and file rights (chmod) settings were correct.

After removing [FE][pageNotFound_handling] and 
[FE][pageNotFound_handling_statheader] the error changed to an error 500.
So there was an internal server error on the ajax $_POST request from the 
element browser.

google told me, that I am not the only one with this problem:
http://www.typo3.net/forum/thematik/zeige/thema/119872/

After downgrading to php version 5.5 everything was ok.

Kind regards

Ulrich