I confirm the problem was fixed in Opera 43. Great! Thanks to the developers.

Online radios have problem launching in Opera (version 42.0). Let's take TuneIN – if I try to turn on any broadcast, it produces a sound of 1 second length, then stops. The same problem with any radio broadcast online – play for 1 sec then stop. If you click the "play" button again, the same story – 1 second then silence. Not sure if the reason is in the browser itself, however, it appears only in Opera. Any idea what's going on?

Again this problem.
Opera 42.0, Macbook Air 11 early 2014.
The laptop gets hot while using Opera, the activity monitor shows huge numbers of CPU usage (up to 90-130 % CPU) either for Opera or Opera Helper processes (or both), especially while using Adobe and its products (adobe connect, flash, etc.). Sometimes just for no (visible) reason.

The problem started about 2 months ago, I have no clue what version of Opera it was, but it still remains and consumes my battery in huge amounts, plus melts my table and everything where my superhot laptop is (the insides are clean, seems not to be the dust problem).

The same problem both in stable and Beta versions of Opera. Appeared approximately two weeks ago. No problem like this either in Safari or Chrome. Really annoying and impossible to use Google Photos. Looking forward to having it fixed asap.