A few hours ago I posted a comment in a discussion (http://www.duolingo.com/comment/374616) and a while later I wanted to review it (it was not written in my native language and I felt sure I had made some mistakes - I usually do and they are easier to spot later on). I haven't been very active today so it should have been easy to locate the event in my stream. However it was not there (I checked both my profile and merged streams and nothing). Just a minor glitch I suppose, but still annoying, and that's why I thought it worth mentioning.

(I found the discussion eventually but I had to recall how I had come across that thread in the first place.)