Can you give the other System Details as well?
* System Details
Backend > Help > System Info > System Info
- Database Version: e.g. 5.1.33
- PHP Version: e.g 5.2.9
- Web Server an version: e.g Apache/2.2.11 or ISS
- Web Server Operating System: Windows (e.g. the (Win32) in the web server info
- Web Server to PHP interface: apache2handler
- Joomla! Version: Joomla! 1.5.26 --> make sure this is the latest version:
http://www.joomla.org/download.html- User Agent: Mozilla/5.0 (Windows) - the browser and the operating system of the user
Can you Enable Debug and Set Error Reporting to Maximum to see if you get any error messages?
* Enable Debug
Backend > Site > Global Configuration > System > Debug System = Yes
* Set Error Reporting to Maximum
Backend > Site > Global Configuration > Server > Error Reporting = Maximum
What happens when you create a completely new menu and a new menu module and translate those menu items?