A. File type associations can be complex when you have multiple applications that have associations for the same file type. If you have two virtualized applications, such as different versions of Word, that have the same file type association, the App-V client doesn't know which association to use, and you might get a generic icon instead of the correct application type icon.
The solution is to ensure that only one application has an association for a given file type. For example, if you've virtualized Office 2010 and Office 2007, you could remove most of the file type associations from the Office 2007 versions of the applications except for the old office file types, and remove the association from the Office 2010 for those old office file types, as shown here.