When sending a mail, the yellow notification ("email successfully sent") shows an icon that looks like the "icon is missing"-icon. Seen in version 4:4.5~20100902.1170752-1maemo1.1170522 .
Persists in 4:4.5~20101001.1181693-1maemo4.1181469 .
N900 only (WinCE has no icons), so not komo3-relevant anymore.