No,
that didn´t help.
Could it be that this is an issue with a missing function of my local server regarding execution of ajax etc.? Just thought about it.
Do you have a list of required resources that are needed to run on Ubuntu Server?
Using PHP Version 5.3.2-1ubuntu4.9
MYSQL 5.1.41
Apache/2.2.14 (Ubuntu)
Or needs any special port in firewall to be opened regarding ajax check?