I've installed version 46.0.2597.57 only recently and was hoping to find severe issues finally resolved - but that hope turned out to be premature. I operate Opera on a Win7-64-pro-system on a board with integrated Intel 530 HD-graphics and a monitor with 4K display resolution. That having said, all the way to version 46 and since many, many versions ago videos in so called "full-screen-mode" have not been upscaled properly to full screen but played in native resolution in the upper left corner instead. Also, when playing CNN-Videos (and others, CNN only showing the most drastic effect), they got stuck every 10 seconds or so and were unplayable on the setting "use hardware acceleration". Without "hardware acc." on the other hand the performance on other data-rich sites was rather poor at times but overall still acceptable.
Now on version 46 things have changed and videos are finally scaled properly to full screen at long last. - But, at what cost?! CNN-Videos get stuck even quicker and more often (if that is at all possible) and other (mostly flash) videos tend to lose/suppress frames abundantly and play asynchronous to sound over time on "hardware acc.". So, let's turn "hardware acc." off again. - Bad idea! In fact, very bad idea.
Data-rich sites become sluggish to load to a degree that my broad-band-connection reminds me of the 9k6-modem-days of yore, even my (mostly text-based) mail-account gets unresponsive for 15 seconds before I can select any particular mail. But that all pales in comparison to e.g. "Google Maps". The latter site keeps on loading, ..and loading, ..and loading ..forever! To the effect that the final navigational layers (to zoom in & out and moving around) will never appear and thereby will render the site entirely unusable. And that is only the most dramatic example I've stumbled across.
So, what the hell is going on? Who does release such crap in the "stable update stream"? And before someone here bothers to declare my PC-hardware as broken/outdated/virus-infected I should perhaps mention that "Chrome"/"Firefox" both work like a charm (only "Chrome" also showing stuck CNN-videos with "hardware acc." setting "on", but only in ~5% of cases, and in "Chrome" I can still turn that setting to "off" - and everything works fine then with only minimal delay when loading).
Any comments / suggestions?