The Vista compatibility list here:
http://www.iexbeta.com/wiki/index.php/Wind...patibility_List will give some examples of incompatible apps.
Please note that incompatibility
IS NOT an all-or-nothing thing. For example, pcAnywhere v11.5 is not Vista compatible - but it will run just fine until you try to automate some tasks, then it will fail and won't even notify you that it failed. Other programs will work, but will require special gyrations to use, or will require that you avoid using certain commands. When first using AVG Free on the Vista beta's, it required that you install it in Compatibility mode, then you had to dive into the Program Files directory and set all of it's exectutables to run in compatibility mode also.
This isn't a problem for those who are familiar with mucking about in the file system and the registry - but for the average user this just isn't possible. This is because there's not easy way to tell about partial incompatibilities. In my example about pcAnywhere above, my only recourse was to resort to manual tasks until v12 became available.