julos08 wrote:Of course but do you know if it's possible to change the configuration to authorize the special character?
It is not a question of "authorize", it is a question of
a) which browser you are using
b) which character codes your HTML and your Apache are using
c) which character codes your filesystem uses
d) which character codes are used for MySQL Database and Driver
If (for example) the character code of your file system has changed (due to the different OS, for example utf16 instead of latin1), the filename is stored with a wrong character code in your Joomla database. This is quite an ugly problem, therefore it is not recommended to use special chars in filenames.
I am sorry, but it is hard to help you out of this, you should find out which character sets had been involved in the old environment and compare it to the new environment. This may also effect the MySQL Database itself and the MySQL Driver. If any component has changed, your are in big trouble.