User Agent: Mozilla/5.0 (Windows NT 5.1; rv:22.0) Gecko/20100101 Firefox/22.0 (Beta/Release) Build ID: 20130618035212 Steps to reproduce: 1.Go to a youtube video. 2.Click "(Show the comment)" on one of the reply comments. 3.Immediately scroll down. Also happens in unrelated circumstances, could not isolate the cause. Actual results: Comments are not displayed : http://img856.imageshack.us/img856/6062/7ckx.jpg Expected results: Comments should be displayed.
I can confirm that in latest nightly x86 on Win7 and Win8. It seems that every branch is affected.
Thanks for the report, but I already filed one in Tech Evanglism. We'll try to open a discussion with YouTube to figure this out.