Flash is usually a big part of why Chrome has issue. Thats because they use the pepper plugin, which is usually 1 beta update ahead of the normal flash plugin. If were talking Linux, then yea, they are all the way back on v. 11.2, so Flash problems might be a issue.
As for Opera, I don't use it personally, except when testing, but I hear it hasn't been the same since the last update? A new UI?