Hi Sam, thanks for your responses.
I don't rule the out the bug report. But I will wait to see if there is an response from Christian, who said he managed to install from USB key without problems. Maybe I can find out what I am doing wrong.
yeah, I am using the 2.2 Iso and create a bootable usb key with UNetBootin. I tried to follow this tutorial
http://trac.zentyal.org/wiki/Documentation/Community/HowTo/InstallationFromUSB, but the installation routine already is different to that.
First it searches for the files, than it says it can find them. Fine. If I click yes to repeat it will never end, so I go for no and get to a screen with various options and I go for the cd-rom again. There I can choose to look on removable devices, but nothing happens. It goes straight back to the screen where it says that it fails to find the cd-rom.
I can't give the path manually.
And I learned it the hard way that Zentyal doesn't work with 11.04. I had Ubuntu it up and running but then noticed that it won't work properly...
But at least I saw that Ubuntu 11.04 is working... ;-)