Have tried all suggestions on various posts:
However, it is only a problem if the language is defined in config.php as anything but English. If it is English, then problem solved. If I changed back to German, then the problem returns, whether "use google libraries is installed or not.
Has this issue been picked up by the WP programmers?
if necessary, my details:
WP 3.3.1 running on Linux server (hosted by 1&1), OSX Lion, Safari 5/Firefox 8