On my iPad 2, in some PDF documents, I cannot start annotations at the exact location of my preference; for example, annotations start at the end of the line and this cannot be changed.
Normally, for most PDF documents, the start and end of an annotation can be moved by the user.
Here is what I suspect is happening: the starting and ending point of an Acrobat Reader annotation may be moved word by word. This means that the Reader code detects where words break. In some documents (PDF books mostly, I would be happy to provide an example of such a document should it be asked of me) word breaks are not detected correctly.
It would be great if you could address this issue in a future update.
Thank you very kindly for your time and kudos on your otherwise EXCELLENT *FREE* Acrobat Reader for the iPad!
John A. Paravantis
University of Piraeus
Greece