There is a 64-bit version of both Chromium and Chrome for Linux. There is a 64-bit version of Chromium for Windows.
http://chromium.woolyss.com/#windows

The only thing missing is 64-bit version of Chrome for Windows. If Opera wanted to separate itself from Chrome more and offer a feature that Google/Chrome doesn't already, making a 64-bit version of Opera from the 64-bit Chromium would be perfect.

Originally posted by Pesala:

There is little to be gained from a 64-bit version of Opera, since each tab now runs in a separate process.

Not true. Things should be moving toward 64-bit, not away. Because of programs refusing to switch from 32-bit, OSes are forced to keep emulation software around for years. Windows for example has WoW64, Linux requires 32-bit libraries. Current versions of Windows can no longer run 16-bit programs because developers have migrated away from it over the years, that needs to happen at some point for 32-bit to reduce bulk associated with 32-bit libraries.

Also, I run 64-bit Java for ImageJ and Matlab (they use Java for their interface), so I need a 64-bit browser to work with that Java. Having multiple versions of Java on my system is a pain in the ass as you have to constantly maintain the Java target directories and maintain two different sets of updates. Having 32-bit Java is a huge inconvenience to me and not something I should have to deal with.

Not having 64-bit is a big mistake in my opinion.

I'm using the stock Android keyboard, which is still different than the official Google keyboard.

The spaces aren't added for me but perhaps that is because my keyboard is detecting the bar as a URL bar. It's just strange that it didn't do that before.

The spaces are added everywhere else, just not on that default home page.

I'm running the latest Opera browser for Android (Nov 22nd, 2013).

After the update before the last, the auto-space doesn't work on the default page when searching. I understand it may think that it is a URL, but it didn't use to do this. I use that as a search bar so it is very annoying. Perhaps you should separate the search bar from the URL bar?

Nobody wants to manually enter spaces.

I'm using the stock Android keyboard on Android 4.2.2.

This trick works with pulseaudio after the app is opened, just stop and start it.
pulseaudio -k
pulseaudio --start

I'm not sure if Opera uses ALSA or pulseaudio but you could try a similar trick with Opera. Just a guess.

I'm currently on 18.0.1284.49 stable and still have this problem.

I still can't install any extensions, even though I installed one weeks ago.

This has been a problem for me since opera 15: opera randomly decides when it wants to install an extension. Sometimes it works, sometimes it doesn't. I haven't been able to install any extensions for the past few days though. This is the error:

An error occurred when installing the extension: Download interrupted

Gmail and other Google services are optimized for Chromium, Google did this on purpose. As much as I love Opera 12.16, I had to switch to Opera 15 just for this problem. All Google services run smooth as butter, but at the cost of features, customization, and the true feel of Opera.