Working well in this version, too. Most of the basic functions are working, such as rotating your view, zooming, text selection and page navigation. I noticed that searching for text in the document might have a small bug in it, though; the "Find backwards" option seems to simply not work (I'm unsure when you'd really need this anyway), but the Match Case and Match Whole Word Only options are still working.
For browser integration, I tried it with Firefox 3.6.x and it worked successfully. I then tried Firefox 4.x through 7.x and it would crash; same for the newest stable version of Firefox, as well. It is possible, however, that because Reader is fairly old, it may not work with these newer browsers even in a native Windows environment (and thus, Wine would run into the same problems).
Overall ranking: Silver.
Hibba