[MacDV] when a transition is finished it blinks

[merelyn davi]

Hi,

I've been making slide shows using iMovie.  I've done 3 recently one  
after the other but the last one I started to have problems with the  
transitions blinking when they have finished. It is very off putting  
watching this. To start with it was only dissolve, so I used others,  
then I could only use scale down and wash in and wash out. Now that I  
have finished this last dvd and played it back I notice even those  
blink. Has anyone got any ideas what could be  causing it please.

I'm using iMovie HD 6.0.3
Mac OSX 10.4.8
19.07 GB free space
768 MB ram

Thank you for any suggestions.

Merelyn Davi