I have the same problem.
Having installed ojs 2.4.2 I find that the logs turn up many errors similar to
[error] [client 184.108.40.206] File does not exist: /var/www/journals/lib/pkp/js/fontController.js, referer: http://ojs-dev/index.php/tesj/manager/reviewForms
The installation was a full install copy of user files and then rebuilding the old database.
The missing files are is located in the /var/www/journals/lib/pkp/js/functions
directory. As you can imagine some functionality is lost.
I tried searching the ojs directories to find references to these directories but so far no success.
Does anyone know how we can alter where ojs looks for these files?