Same here on my N900, with several APK versions. It has some memory leak, because after launching, it just fills up all available memory and swap space and after while the phone reboots. This function seems to be for Harmattan, so it assumes its file locations and executable commands. To make .desktop file working for N900, just move it to ./hildon subdirectory and on the Exec= line remove "invoker --single-instance --type=e " part of command, so ApkEnv will be called directly.