Hi Janusz,
No I had not access anymore to the first company.
But I copied now files from a backup where the login was working to the folder themes on the serves, all themes excluding the three default ones.
Then the login was working again, and I updated again the themes.
Seems now it is working, till now :-)
I had changed the theme before update to default for admin, but as I saw in the DB an other user had still fancy, seems that the problem was coming from there.
In the error-file I see new this:
[11-Dec-2010 15:19:08] 0::config.php:61: date() [<a href='function.date'>function.date</a>]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead
[11-Dec-2010 15:19:09] 0::date_functions.inc:22: date_default_timezone_get() [<a href='function.date-default-timezone-get'>function.date-default-timezone-get</a>]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead
These two lines are repeated on more then 200 lines ....
Mhh - what I must change?
With the RFC version I did not had this message, and I only updated, I have not changed any configuration beside theme and language.
ernie