As toas a not at all expert in forums, I will say that all software can use the occasional update, and Ten Forums is not alone in that. As a member of one particular Forum (they're using that nasty old Linux and Apache something or other), we're always informed of every update and asked to give feedback on anything we see that might hinder our enjoyment of the forum(s).That's probably a flaw in the software Ten Forums is using.
I guess what I'm saying is that, although Spartan has a long way to go in my not so expert opinion, just as hardware manufacturers must, even Forum and Site builders must make some concessions to a new browser and/or operating system, just like AMD, Realtek, Intel, etc.
There are now lots of tools to detect if browsers support given features, and there is no longer any need to do browser sniffing, but theres a lot of old code out there.
I can view the forum using Spartan but cannot post.