After switching to a Dutch translation (which seems to work), I get the following error message:
"Het bestand kon niet aangemaakt worden"
Which means "The file cannot be created"
The Drupal log (version 6.4) shows the following 3 entries;
/fopen() [<a href='function.fopen'>function.fopen</a>]: SAFE MODE
Restriction in effect. The script whose uid is 10019 is not allowed to
access
/var/www/vhosts/treehoppers.be/httpdocs/sites/default/files/tmp/fileWANyLT
owned by uid 48/ in
//var/www/vhosts/treehoppers.be/httpdocs/includes/file.inc/ on line /757/.
/open(/var/www/vhosts/treehoppers.be/httpdocs/sites/default/files/tmp/fileWANyLT)
[<a href='function.fopen'>function.fopen</a>]: failed to open stream:
Success/ in //var/www/vhosts/treehoppers.be/httpdocs/includes/file.inc/
on line /757/.
An error occurred during creation of the JavaScript translation file for
the language /Nederlands/.
The /sites/default/files/tmp directory, and the files it contains are owned by user Apache, group Apache, and are both writeable. The directory contains files with length 0.
The switch to Dutch works fine on my own (windows) machine.
I suspect some problem with the webserver/php setup, but my hosting company (eTech media in Belgium - who claim to be Drupal experts) has been unresponsive.