Multimedia upload not working

Hi after i upgraded my wordpress site to the later version i can’t upload anything! i tried removing all plugins that use the upload system. and i still get the error:

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'sanitize_mime_type' was given in /home/jvs512/carta/wp-includes/plugin.php on line 166
379

the file actually uploaded but it just show a blank file and when i edit the file the file tipe is not set. pls help me! this is a big big project! and need this solved i cant!

thx in advance!

sorry for my english im in a rush!