Sorry, my comment about changing the thread title was intended as a joke.
But useful knowledge, so the answer is:
Go to first post of thread -
Click the little "report post" button -
Make request in the text box.
(Handy knowledge to have if you run across a useful thread that is missing a "prefix" tag.)
The "indexer" is only broken for some books, not all books.
It is some of Amazon's closed source firmware, you have to ask them to fix it (
I.E: lots of luck with that).
Note:
If you ask ixtab to JBpatch the indexer's problems, he will probably run, screaming, into the hills.