They don't appear to have improved this in CS 5.5 either.
This is why I chose not to renew my paid Acrobat.com account. It looked promising on first glance but nothing worked as well as it ought to have.
Another example:
I'm using an InCopy workflow via a DropBox folder with clients who need to edit my magazine layouts. One would think Adobe would offer their own cloud-based server for InDesign/InCopy users. But they seem to be pouring their resources into sexier features that are of little interest to the bread-and-butter, daily productivity tasks that would really save the users time and money.
The whole option of sharing a PDF seems to be useless at this stage of its implementation. If anyone can tell me how they have successfully used a shared PDF, please do - I'd like to know! I work with a lot of edited PDFs every day; only a few of my clients can or should use InCopy. So I would really like to find a better way to have multiple people commenting on the same PDF.
