kmaglione/zamboni — comment on commit 39df354fd22635f2d99397cca0992b09b2d13b37
File: media/css/zamboni/files.css line 200
By kmaglione:

It happens client-side after we fetch validator results.
files.js:395 in the latest revision of my local tree. My local
install has been failing to kick off the validator job, so that
could be your problem.