[PLUG-TALK] Strange behavior in revised web site

[Rich Shepard]

I'm asking for either mail lists or web fora (perhaps stackexchange) where I
can get help fixing a web site issue that popped up yesterday.

BTW, I resolved the horizontal rule issue by adding an hr{} block to
styles.css.

My current web site has 7 static pages. As part of my revisions I removed 3
of them, then realized I need one of the removed ones. So I restored that
file from backup and it's the third page in the site's menu. The problem is
that I can display that page from only two of the other four pages:
 	page 1 can open pages 2, 4, and 5;
 	page 2 can open pages 1, 4, and 5;
 	page 3 can open pages 1, 2, 4, and 5;
 	page 4 can open pages 1, 2, 3, and 5;
 	page 5 can open pages 1, 2, 3, and 4.

In the menu on each page the other pages are specified as being in the same
(current) directory using "./pagename.html".

All five pages pass the W3C validation checks.

It was not until I removed the three pages and added one back that this
situation occurred.

My web searches haven't found anything useful, perhaps I've not used an
appropriate search phrase.

Any and all suggestions are appreciated.

Rich