[Koha] After Update to 3.4.1 - XML error

[Journals Digital]

Dear all,

after updating to 3.4.1 I got a new problem. I tried to fix it with help 
of the list and google, but there is still no result. So I hope you can 
help me.

At first, I found out, that I should switch my language back to english 
before doing the upgrade. Sorry I didn't - read it first after the 
update - so I think it will be the reason of the problem.

I use language german!

What had I done:

1. After the upgrade I could not open the webinstaller. After looking in 
the list I found that the *.pl files need permission.. so I chmod all 
files in the cgibin folder for intranet and opac (with -R) . -> Problem 
solved I could run the webinstaller.
2. After that I got my problem. The display was broke down, and I got 
the error:
" xml:lang="" dir="" xmlns="http://www.w3.org/1999/xhtml"> 
/includes/favicon.ico" type="image/x-icon" /> 
/lib/jquery/plugins/ui.tabs.css" /> /css/print.css" /> " /> 
/css/staff-global.css" /> /" /> /css/modules/" /> /css/pages/" /> /" /> 
/css/login.css" /> /css/wizard.css" /> /css/" />

and the layout was broke down.

3. After some search I found the information, that the po files are the 
problem. So I downloaded the 3 files with copy fro pootle down, and 
paste it with overwriting in the po files of koha.
  -> Result nothing.

4. I read that I should switch the language back to english and 
reinstall german. but I do not now how. -> would that not help?

So I will copy some error logs:

The last:

[Thu Jun 16 11:53:35 2011] [error] [client 127.0.1.1] File does not 
exist: /usr/share/koha/intranet/htdocs/<!-- TMPL_VAR NAME=, referer: 
http://127.0.1.1:8080/

Before I played a little around, so I got by the try to change the 
language over the staffpage :

[Thu Jun 16 11:53:07 2011] [error] [client 192.178.0.3] [Thu Jun 16 
11:53:07 2011] mainpage.pl: Template process failed: file error - 
doc-head-open.inc: not found at /usr/share/koha/lib/C4/Templates.pm line 
119.


I hope you can help to get the problem fixed. I am really helpless now.

What should I do?

Thanks a lot.

Best Regards.

Florian