Adobe silently released Reader X, for now only for Windows. It can be
downloaded from:

http://www.adobe.com/go/EN_US-H-GET-READER

Installer for offline installation can be downloaded from.

ftp://ftp.adobe.com/pub/adobe/reader/win/10.x/10.0.0/en_US/

It allows saving PDF after adding comments or highlighting text. AFAIR,
Reader 9 didn't offer that.

Regards,

-- 
Vedran Miletić