Unfortunately, it's nothing that you can do a screen shot for. It only seems to affect scrolling after a sub-forum is opened and then only if I start to scroll as soon as the load finishes - which *is* very fast. It typically only does it once as soon as the page loads, as if the page is still loading in the background/buffering.The site is actually faster by every metric (nearly 30%). The first thing I'd suggest doing is clearing your browser cache. If you can give any specific links/screenshots or examples for me to look at, that would be helpful.
Clearing the cache has no effect - I tried that as a first option thinking the site may have been using old data. I also run a very small local cache to force full page loads as much as possible simply because many sites programming just don't properly deal with outdated data (i.e. bad programming/cache verification/etc. - Walmart is especially bad in this regard).
It's certainly not a deal breaker, more odd than anything. It's like a stutter when first scrolling the page after it loads and *only* on thread titles. I've not noticed it inside a thread.