I am using Audition CS5.5 under Windows 7 64-bit. I am finding that quite frequently, when I click the "open file" icon in the top left of the files pane, Audition simply freezes -- I don't get an error message; the application is shown to be running as normal in Windows Task Manager, and doesn't have suspiciously high RAM or CPU usage. It just won't do anything further. I have to close it via Task Manager.
I don't have any other files open at the time, but so far this has tended to happen immediately after doing batch processing.
However I haven't been able to identify specific steps to reproduce the issue 100%.
Has anyone else experienced this?