Today I updated 3 of my apps and when I clicked the platform icon in my sys tray (Win XP SP3), it made that "blonk" error sound and the icon disappeared. I restarted it and everything was normal.
The same happened several times during the last months when I uninstalled an app.
I know this is one of those incomplete error reports no dev likes but I cant say anything else.
One idea I had is that it happens if I install several apps at the same time or shortly one after the other and the platform hasn't finished refreshing its app list but I couldn't reproduce it on purpose.