List of things that broke with the Opera 15 release due to the switch to Blink/Chromium (Web features, not UI-specific stuff)

opera-15-regressions.md

List of features that are supported by Opera 12 but not by Opera 15 due to the switch to Blink/Chromium:

• xhr.responseType = 'json' fixed as of August 19, 2013
• Link HTTP header
• Link HTTP header for stylesheets specifically
• Pressing Enter when an element with tabindex has focus should trigger a click
• Fragment identifiers in data: URIs should be handled correctly
• CSS gradients with transparency
• Accurate SVG rendering
• <img src=foo.svg> where foo.svg is an SVG file that contains text looks terrible
• Support colors with alpha in SVG stop elements and feFlood
• (Partial) IDNA 2008 support
• The object-fit and object-position CSS properties
• Unprefixed CSS transforms
• DOM attributes should be moved to prototype chains and should expose JavaScript getters/setters
• Protection against regular expression DOS

@mzgol Apparently not: https://code.google.com/p/chromium/issues/detail?id=332096#c3