Basically the end of the JS file is being shown as:
which is what the actual file has. So it isn't an issue with the Structure files not having been uploaded properly.
I've even tried reinstalling on another server, but same issue. I've also upgraded EE to the latest 2.10.3 version and installed the most up to date Structure version (3.3.19). Same issue.
I'm running on Ubuntu 14.4 with Nginx and PHP-FPM.
Anybody any ideas?