I had some issues with a thumbs.db which did not uninstall or get removed using the "Additional files to remove" feature of ICP build 32. You read my issue here
Note: My uninstaller was a patch uninstaller which updated the original uninstaller .. not sure if this is a bug or not but there is a way round it
The fix is simple.
Include the thumbs.db file within your installation making sure it installs and the uninstaller will then remove it when you run the uninstall.exe
Hope this helps others as this has caused me real frustration over the past two days.
PS: Yves not sure if this is a bug