User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:15.0) Gecko/20100101 Firefox/15.0.1 Build ID: 20120907230816 Steps to reproduce: This is a regression in Firefox 16, can't reproduce with Firefox 15. We have a couple of sites on the intranet that use Kerberos authentication, a Mediawiki, Gerrit, etc. When they first send a 401 to Firefox 16 for a file and then a 304 response, Firefox 16 shows that file as empty. Sometimes the CSS, sometimes the html body, etc.
Could you please create a http log https://developer.mozilla.org/en-US/docs/HTTP_Logging
Created attachment 666878 [details] http log In this run I first load the page and it looks fine. Then I press reload and then it looks like a .css file becomes empty and I loose all the layout.
Would you help us with a regression range search ? That will hopefully show us the change that caused this issue. We have a tool that helps with this task and you have to test only a few builds until it find the last working and the first bad build. - https://github.com/mozilla/mozregression#readme
Sure I should be able to try that on monday.
Mozregression doesn't support being behind an authenticating proxy... :-(
Haven't seen this in a while.