Randomly getting "Your browser is not supported"

This error happens every once in-a-while and just eventually fixes itself and allows me to play. Sometimes it tells me that I don’t have ROBLOX Player installed and prompts me to download. Again, this only happens like 5% of the time. I am on Safari 7 on OS X Yosemite, but this has been happening on and off ever since I’ve started to play ROBLOX.

What I mean:

Thank you for submitting this report. We are currently reviewing all bug reports to ensure we have not overlooked any ongoing issues. Since this issue was reported over two years ago, can you please confirm you are still experiencing the problem? If so, please respond to this thread, and we will investigate. If we do not receive any response within 30 days, we will consider this matter resolved. Thank you.