Yellow spots starting on leaves

[Cate090404]

Here is a picture. It's a pretty healthy and blooming plant. Just want to make sure that nothing is wrong early.

[img]https://i103.photobucket.com/albums/m154/kit_kat_01_2006/tomatoleaf.jpg[/img]

[BillyBoy]

Is it just that one leaf? I would go ahead and give you're plant a good flushing of plain water. then see what happens.