When in Safari reader, there is a vertical scrollbar immediately to the left of the webpage content. Pressing VO left arrow will cause Voiceover to scroll to the bottom of the page. Pressing VO right arrow from there will result in the, "Boundary reached," sound as expected. This is with curser rapping turned off.
Bug First Encountered:
How often the bug occurs:
To get to the top of the page, press VO FN left arrow and then VO right arrow.