I use Opera 12.18. Personally I do not like the Chromium-based browsers, partly due to the interface and partly due to the fact they seem less configureable, such as not being able to relocate my cache folder. So I will be staying with Opera 12.18 unless there is a further update for that. I notice in the Changelogs page there is no mention of 12.18, it only goes up to .17. Opera 12.* works well on non-SSE2 CPUs. But I cannot find a download link now for Opera 12.*.