Re: show-paren-mode prevents page-down from displaying next 1/2 page.

[Richard Stallman <rms@gnu.org>]

    To setup this rather strange bug, you need to:
       1. ensure show-paren-mode is enabled
       2. create a buffer and in that buffer, half way down the window,
	  create a line that has some [] brackets such that the ] bracket
	  is the last displayed character on the right of the screen.

	  I also had characters after the ] so that the right hand "fringe"
	  displayed its wrap-around icon.

	  It is important that the [] line is displayed half way down the window, e.g on the 5th line on a window height of 10 (9 lines displayed due to wrap around).

       3. place point anywhere on the line with [] brackets and press the page-down key.

    Instead of paging down, the display will flash and place point immediately after the ] bracket.

Can you send us a _precise_ test case for this bug?
Please read the Bugs section in the Emacs manual, which provides
guidelines on how to write a bug report to give us the
necessary information so we can fix the bug.