Reader asks to save some documents

If they're forms, they may ask to save every time per the save protocols by the author of the form. If they're NOT forms, save them with a different name (add a dash between words) and it shouldn't prompt for a save again.

There are security changes in XI that alter the metadata upon saving. Older versions (9 and below) don't have these changes.

None that I know of. They're designed to "prevent security breaches from unauthorized sources" and written into the code of the app.

That I couldn't do. I'm a freelance web designer, not an Adobe employee. I just volunteer here. The "prevent security breaches" came from a release note I read some time back. It's generic for "we fixed some things we missed the first time" as far as I know.

Don't hold your breath that someone from Adobe will help.

Perhaps you can share such a file (obviously, share the BEFORE file) on a public web site.