The husband thinks that as glitter graphics, which I often use for greetings, uses Java, the fact that Java has recently been updated may have something to do with them not showing.
He thinks that the reason it shows on my computer is because I have an applet (Which I thought was a small apple, but there you go,) on my computer for them. My friend Gill is the only person to say that she sees the letters, and is someone else I know who uses the glitter graphics - so she would have an applet as well. Or something!