Invalid URL that is not one of the top 3

I am getting errors that say invalid URL, but when I look at the data
none of the 3 reasons that Froogle suggests for the error are there.
There are not spaces, just underscores, no back slashes, and all the
URL's start with the necessary http://. Why is the URL invalid?

Here is one of the invalid URL's:

http://www.sailingbreezes.com/Sailing_Breezes_Current/Marketplace/weems&plath/binoculars.htm