Looking at your "twenty people" website, greeting me with a big "Warning: You are using Opera. This browser is not supported" text on the top, maybe explains a bit that this thing is failing. There are about 30 - 40 million opera users out there. If the main website of your project starts with that attitute, I'm wondering if it goes on like that.
thanks for telling me, we actually are just about to release a new product in the coming days that allows all browsers, is much clearer in the message and hopefully will clear a lot of these issues! really appreciate it!
it did for a while when we used the canvas I believe, we had some major issues - but there was one charting thing that just needed it and we couldn't get it to work on IE/Opera... so we tried to fix it, but got stuck.
I'm not a web developer but if you're willing to throw a few minutes at the problem I have a few suggestions.
1. Open your app in Opera (if there's a hard link to a page containing the offending issue then it's even better) and go to the main menu button - help - report a site problem, and you should fill all the relevant details. Hopefully you will get someone from Opera to assist you since they have an entire team dedicated to this sort of thing.
2. You can check the answers to this post (Opera IamA on reddit, 1 year ago)