>This is usually caused by the source for the icon not being present on the target system - for example, if you select an icon from moricons.dll, but it is not present on the target system, the default icon for the file type is used. Check the \WINDOWS\SYSTEM directory for the common icon sources.

Okay, I'm happy now, anyway. Copied the ICO to the user's machine, and selected it for the app, so my desktop icon is fine. Told user to put in a Lanhelp call for the others, that's really beyond my scope to fix.