Every time you Install or edit a file, check all the links. Not just before, but after it is Installed.
While cutting and pasting, you can easily miss the first character of a line, like < and leave a tag like this:
Li><a href="#birds">Birds of North America</a>Or you can accidentally erase one of the " quotes while typing in the name. or altering the name, like this:
<h3><a name=cats">Foolish looking cats</a></h3>
<h3><a href="Dog.html">Shetland Sheep Dog</a></h3>or...
<h3><a href="dog,html">Shetland Sheep Dog</a></h3>If it is in the SPCA/ directory, it is easy to type:
<h3><a href="spca/dog.html">Shetland Sheep Dog</a></h3>To avoid these errors, I always use copy-and-paste. Never re-type.
Here is an example. This one is murder! It blotted out most of the file.
<!--<Here are two more with stray characters that accidentally got left in the tags.
<<Li><a href="#birds">Birds of North America</a>
<h3><a name=cats">>Foolish looking cats</a></h3>