Why is wget copying my directory tree with some files with "@"?

I'm using wget 1.11.4 on Cygwin 1.5.25.

I'm trying to recursively download a directory tree, which is the root of a javadoc tree.

This is approximately the command line I tried:

wget -x -p -r http://<host>/.../apidoc

When it finished, it seemed like it downloaded many files the way I expected, such that it created a directory corresponding to the URL path element, and put the new file into that new directory. However, many other files were put in the "root" directory which should have been in directories, and the resulting name looked like " index.html@text%2Ftest%2Ftext.html ".

I also noticed that for the files that got written like that, the request for the file from wget looked like this:

http://&lt;host&gt;/.../apidoc/index.html?overview-summary.html

This example was written with the name " index.html@overview-summary.html ".

I must be missing something simple.