Imported Items, both viewing items and editing, is the most common place that AC (5.029) crashes or freezes on me. I very frequently also get a slowdown (the little blue circle that replaced the hourglass in Windows 7) when I am working in Imported Items. My IT people think that it has something to do with a conflict with Adobe Reader, working as a helper app in AC, displaying PDFs.
I have noticed more frequent slowdowns & crashes with Reader version 9, than on computers using versions 7 or 8.
