Fairly major bug relating to COM Components

[richardpenner]

If you use the Component wizard to extract COM information for a COM server in your installation, or even if you add the COM Classes, ProgIDs, and TypeLibraries manually, deleting any of that information will not remove it from the MSI.
This is similar to one of the bugs mentioned in the post titled "Possibly the most Buggy piece of software this year (http://community.installshield.com/showthread.php?t=154757)."

To fix this problem, I used the Direct Editor to modify the Registry table and remove all keys associated with those components.

[SGorman]

Honestly, I've gotten into the habit of always using XML format for the project format so that I can do a file diff after making my changes. It is pretty common that I end up opening the .ISM in notepad in order to find or fix something that I couldn't seem to find in the IDE.