kenest

… or you can simply rename ui.core.js for something neutral and change the links in plugin’s files.

I had the same problem as upnsadmin described. Asked my hosting-provider about it and he found out that the trouble was with wp-includes/js/jquery/ui.core.js file – it contains “core” so the system mistook it for memory dump. you need to check your server http.conf policy about files with “core” in name and search for something like

<IfModule mod_authz_host.c>
<Files ~ “^\.ht”>
Order allow,deny
Deny from all
</Files>
<Files ~ “.*\.core”>
Order allow,deny
Deny from all
</Files>
</ifmodule>

so you need to add $ in the “.*\.core” template – “.*\.core$”