Headers and search engines

if i create a <h#> tag where the
text is yellow,
the background of the page is, green
and the table background is green
but the cell has a gif background image that is yellow (same as header text)
is that going to be viewed as hiding text when the bot come crawling onto my site?

(BTW i am changing what i can over to css, i've been reading and it will happen soon.)

The reason I need to this is because when you use a header tag, it line breaks, and then everything gets moved down. So i guess one more question: should i use a header tag at the bottom of my text? Is there a way to keep a header tag from line breaking?

I don't think that a spider can look into the color of the gif image (or any image). I know they can get an image and cache it, but as for detecting color, I don't think they've moved that far.

As for the uesrs (which come before SEO), I would make sure you change that little bug (as you mentioned you were going to) as soon as possible.

You should use the code that is correct for the text. Is the text a header? or are you just trying to easily make it bold and bigger? Use the proper tag for the data/text, then fix your problems with CSS.