I have been using Adobe Audition since it was Cool Edit Pro. I have had very few issues with it over the years. I stopped upgrading once it reached v3.0.
I recently upgraded to CS6 and now have issues with files saved using the WAV codec. Several software packages will not recognize files saved using the standard WAV codec. To get around this I have to save them as MP3 files which is not what I want to do.
Unfortunately, this is also a new HP Probook laptop, so I am not sure if it is an issue with the codecs that came installed, or if Adobe installs new ones. I did not have issues before.