Even worse, you mean. It breaks the standard navigational tools, so after I had hit pagedown several times, I pressed a right-arrow once to shift the page slig

Even worse, you mean. It breaks the standard navigational tools, so after I had hit pagedown several times, I pressed a right-arrow once to shift the page slightly and it skipped me all the way back to the top. It happened again later when I absent-mindedly pressed the right arrow again. This is totally broken.