I've been using Opera since, I dunno, 7.13 maybe (or whatever version was out around september 2003).
After windows 8 came out I switched to Chrome for around a year, since opera couldn't even be set as the default browser, plus various other annoyances, which, to me, was the start of the "one step forward, ten steps behind" mentality at Opera HQ.
Then I switched back to the new opera with version 17 I think, when tab pinning was added (or, rather, restored), as like many others I was lamenting missing most of the features, but at least most websites now worked correctly (except anything that uses flash, switching tabs makes flash lose focus, which is pathetic), but hey, at least it's not Chrome, right?.
And now...now...this **** happens.
For now I will use the workaround posted in this thread (many thanks to the tipster), but I'm getting pissed off badly.