SBP Attach sometimes searches files it shouldn't

I added some new tests to SBP today, and found a bug in the SBP Attachments module... How to explain this... Let's see...

If you are using CCK FileFields with Search by Page Attachments:
a) Create a FileField on content type A
b) Attach the same field to content type B, using "add existing field" in the Manage Fields screen.
c) On the Search by Page settings page, attachments section, choose content type A but not content type B to index attachments for, and choose the CCK field name you defined.

In SBP 6.x-1.6, you will find that the CCK FileField attachments for both content type A and B are both indexed, even though you just wanted content type A's attachments to be indexed.

I have a fix for this, which I will check in and release within a couple of hours, as soon as I finish testing.