If Adobe Reader is already open, double-clicking a pdf in the finder does NOT open it in reader. It activates Adobe Reader, but the darn application never opens the file. If I try to open the file via Reader's "Open" dialog box, some never-ending cycle of "Missing Icon Resource" error messages forces me to force-quit.

Amazingly bad. And still no internet plug-in. And it displays ad text in the top right of the screen.