Last modified: 2014-02-12 23:55:24 UTC
Probably due to Gerrit change #63800 (fix for bug 47572)
I suspect some resource caching is going on. Just tried out Opera Mini and all sections are expanded. There was a slight issue yesterday where the gerrit change you referenced hadn't been deployed.
It's due to section HTML stripping in beta mode.
Well that's a different bug. *** This bug has been marked as a duplicate of bug 42746 ***