Wordpress returns unfound file only when cacheing enabled

Question

Seems like a simple problem, but I can't find an answer.

With cacheing disabled, everything works fine. With cacheing enabled the following javascript include returns a Wordpress 'page unfound' error.

http://myserver/wp-content/plugins/myplugin/js/jquery.cycle.all.min.js

I'm disabling the cache using the Firefox web developer tool, but I can't see that that should have any bearing in the issue. For some reason, Wordpress can't find a legit file.

The script is properly registered and queued with the following code:

 wp_register_script("jquery.cycle.all.min.js", $plugin_url . '/js/jquery.cycle.all.min.js', 'jquery');
 wp_enqueue_script("jquery.cycle.all.min.js");

Answer 1

Clear browser cache. (dur ... I know).

Unexpected behaviour when switching browser cache on and off, with files that were kept in the cache for a long time.