For example lets look at any topic with loooong content, like this:
When I scroll up and down by mouse, I feel really uncomfortable because everything is not smooth like it used to be with any pages that I scroll in my browser.
This happens because of automatic URL update in my browser’s address bar. The feature itself is excellent and right, but it really annoys me (the reader!).
Really, it used to be very smooth with any webpage when I scroll it, but not with Discourse.
Even more, my mouse it blinking while I scroll, and the favicon in the tab is blinking too. It just looks like something is wrong, but you do not understand what exactly until you catch this blinking of the mouse and of the icon.
It behaves like when you have a very old computer with very slow processor and with on-board videocard.
My proposition is to find a way to fix it because it is very serious GUI bug from the user point of view.
I’m not yet sure on how to fix it - sorry it is not very constructive to report a usability problem and not to propose a way to fix it… At least update browser url when user stops scrolling, just in few moments after this, or when mouse leaves scrollbar rectangle (if scrolled with scrollbar).
P.S. Trying Discourse on Win7 x64, Chrome.