Error: "The argument should ben an array, line 313" while update.php after upgrade from ckeditor 1.8 to 1.10

I did a update.php after upgrading drupal module ckeditor 1.8 to 1.9, without upgrading the dir "ckeditor" from ckeditor.com
It's drupal 6.24 and a lot of other modules, see extramodulesjpg
This is from the log:
array_pop() [function.array-pop]: The argument should be an array in /var/www/www.xxxxxxx.nl/update.php on line 313.
This is from de Watchdog:
a:4:{s:6:"%error";s:7:"warning";s:8:"%message";s:98:"array_pop() [function.array-pop]: The argument should be an array";s:5:"%file";s:50:"/var/www/www.xxxxxxxx.nl/update.php";s:5:"%line";i:313;}
Just did a fallback to ckeditor v1.8 and then upgrade to v1.9 and update.php: no problems. I affraid to upgrade from ckeditor v1.9 to v1.10 because it's a production environment and I'm glad the site is OK now.
I upgrade from ckeditor 1.8 to 1.10 directly on serveral other drupal website without any problem.
It seems this problem is caused by ckeditor v1.10, does anyone know the reason of the error?