Tell us what you did to get that result, ie. the program used, the filter, (Render -> Lighting Effects ?), the process or whatever, Just give as much info' as poss' and we'll see if anyone can come with a solution. I've never seen anything like this before, but I only use PS and Lightroom.
Hubby suggested trying on his computer which still runs on VISTA and it worked fine. I was originally using a new upgrade to Windows 7 64 bit - looks like a CS3 problem on the 64 bit. Has someone got a Windows 7 32 bit to try the same process on to see if it is simply a Windows 7 problem or 64 bit problem?
The package I was using was CS3, Filter, Render, Lighting Effects.
I think you may have solved the problem yourself. I seem to remember reading, in the days of yore, about some people having difficulties with running CS 3 on Vista 64 bit. But that was long time ago and I was using CS 4, as it didn't affect me, I didn't pursue the matter. Therefore I can't help you any further.....sorry.