When you start Opera Beta for Linux in windowed mode, it will have spacing between tabs and titlebar. After maximizing and restoring the window, the spacing disappears. It can be seen in the following screenshot: http://imgur.com/a/6cNVb

It's even more broken when you have sidebar disabled because after restoring the window it will not correctly position the opera button, so the opera button will only be half visible.

Even more interesting, I did a new Ubuntu installation and I had libffmpeg.so on hand so I thought that I should copy it for now to get H.264 working faster but it turns out opera does provide it, but in wrong folder...

Easy way to get H.264 working for me was:

cd /usr/lib/x86_64-linux-gnu/opera

sudo cp -r lib lib_extra

Just FYI for anyone looking on how to get H.264 working.

If on Ubuntu install the newest Chromium release(ie. https://launchpad.net/~saiarcot895/+archive/ubuntu/chromium-dev).

If on Fedora install package from:

stable: http://koji.russianfedora.pro/koji/packageinfo?packageID=156

beta: http://koji.russianfedora.pro/koji/packageinfo?packageID=157

developer: http://koji.russianfedora.pro/koji/packageinfo?packageID=158

Use --nodeps while installing them.

So... Opera developer doesn't have H.264 video support.

Looking at http://blogs.opera.com/desktop/2015/10/opera-developer-34-0-2023-0-update/ it says that as long as chromium-codecs-ffmpeg-extra that it should be able to detect the codec, but it's not doing that.

System specs:
OS: Ubuntu 15.10 64 bit
Opera version: 34.0.2036.2
chromium-codecs-ffmpeg-extra Version: 45.0.2454.101-0ubuntu1.1201