This is what the reviews are saying as of November, last year. So I guess it might still be an issue, depending upon where I browse.
"The compatibility of Opera across the net takes a hit based on each site's browser sniffing. Much of the internet is outdated and "sniffs" for particular browsers in an attempt to format the site for the browser. Because these sites are outdated, they may still block Opera entirely."
That said, despite the sour grapes from Mozilla last fall, Opera is still the most secure browser, according to tech reports.
Edited by Old Philosopher - 1/20/16 at 7:58pm