FileTexture remembers Highest Spreadcount

When I load 5 pictures with the filetexture, and than decide to load only 1 picture, the spreadcount off the filetexture node remains 5, but only 1 picture seems to be in the memory.

Pretty nasty one, because I use this spreadcount to figure out how many Quads I need to create to show them all.

Hope you can find some precious time to resolve this minor annoyance.