Sorry to be so demanding, but I suppose you haven't also got a fix for the typing of comments on YouTube not working properly?
You can type fine, but the space bar doesn't work (shift+space does) and the number keys at the top of the keyboard don't work either, you have to use the ones on the right hand keypad.
All can be worked around, but it is annoying!

try disable userjs

For me, the only problem with Presto Opera is the problem with Twitter. If it does not have that problem, I don't need Chromium Opera or any other browser for that matter.

you can disable automatic redirection for twitter.com so it doesn't redirect to mobile.twitter.com
it takes a few seconds to load the sidebars, but after that the site seems to work fine.