I tried the "fix" you suggest for flat style- guess what, it didn't work, I get this massive dump, so I put it back. At least this way I can get a clue as to what I have and haven't read by the posting time, rather than down loading a bunch of posts I've already read.
I'm sorry the fix didn't work for you. I'm fresh out of ideas.
Is there something in the contract that says we have to upgrade when UBB sends out an "improvement"?
Not at all. However given UBBThreads track record of exploits in older version, I'd personally rather have a few people dislike change as we keep current and running (vs. totally down and hacked).
Most of the upgrades have been good. Some of the upgrades have brought important features on the backend, including CAPTCHA registration to thwart board spam and whatnot. Unfortunately, those come with UI changes, and we don't have the luxary of picking and choosing. This particular version has a problem w/ the threaded UI. I promise once 7.2.1 is released, we'll evaluate it and apply if it solves the problem.
I'm sorry I don't have a better solution for threaded users. I've enabled some checking in the stats program to see just what percentage use threaded vs. flat to gauge the severity of the problem.