I have a client who uses a lot of images and is having trouble with the slideshow block as lots of the images were not displaying their thumbnail on the edit window, making re-ordering difficult.

On closer look i could see that it is only the images which have a space in the title, for example "img1234 copy.jpg", which have this problem. Obviously i will tell him to start labeling his files better but can anyone think of any fix that would allow these file to show up with their thumbnails. Re-titling the file does not help, as the file name still has a space in it.

Thanks