When you first click in input boxes, the blue bar doesn't show up. It waits until there is content in the box. (This seems not to appear in post reply boxes, but that's because they have content by default.) (Firefox 31, Windows 7)
Topic on Talk:Structured Discussions
Done fix merged at https://gerrit.wikimedia.org/r/#/c/155809/
Yes, that's a bug that we're fixing. The fix should be out next week. Thanks for reporting it!
DannyH (WMF): as a courtesy, can you please link to bug reports when confirming them ? It helps in keeping track of stuff for everyone.
Oh, sure. I probably should've been doing that all along. I just posted a couple of links in other conversations -- embarrassingly, I can't find the ticket for this one at the moment. :) I'll find it and post it...