When using Tools -> Libraries from the IDE to "Add ZIP/Folder..." to a Class Library I get the following error dialog.

"Error: Invalid Javadoc root <full path of zipfile>.  The Javadoc root does not contain the index-files folder or the 
index-all.html file."

Looking at the zipfile I am adding I find that it does have an index-all.html file but that it does not have an index-
files folder.

$ unzip -t <zipfile>

    testing: index-all.html           OK

It is unclear if the index-files folder in mandatory and therefore this zipfile is incomplete or if the error is 
misreported.  The zipfile is added to the list and the javadoc for members of this library do load as expected.  If it 
is that index-all.html OR index-files is necessary then this error is incorrect and this bug should be assigned.  If 
BOTH are necessary then I need to get the zipfile fixed and the bug should be filed as "not a bug."

Thanks.