White actors on update

I like actors of all colours ... but I need to talk about white actors!
OK I backed up my projects and installed 0.9.3 - everything is fine apart from just 3 small actors which are showing in preview as white boxes. I've dragged the image from my images folder to see if that got it working but no luck.
Anyone else had this? Solution?
Thanks.
OK I backed up my projects and installed 0.9.3 - everything is fine apart from just 3 small actors which are showing in preview as white boxes. I've dragged the image from my images folder to see if that got it working but no luck.
Anyone else had this? Solution?
Thanks.