It looks like there is a race condition in our download system. If the download asks for a compressed version of a file, it does not wait for the compressor to start up before moving on and trying the next file. Sometimes this results in 2 or 3 Javascript files being downloaded with empty contents. As this is a race condition, it's very difficult to reproduce, but I've made some changes that should at least let it use the uncompressed file if the compressor isn't ready yet. I've replaced the affected files on your site. As this issue is related to our server configuration and not really with the VaultWiki source code, I've marked this appropriately.