error with joomla 1.7

[varshabi]

In joomla 1.7
phoca gallery control panel, when I click on options and change any thing and save, this error will appear:

"Not Acceptable
An appropriate representation of the requested resource /administrator/index.php could not be found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. "

Please help

[paulosei]

I have the same problem. Everything was fine until today. It effects all joomla.

[Jan]

Hi, did you ask on joomla.org forum, did you disover which change on the server caused this behaviour now?