Will writing these keywords differently matter?

I'm working on a site of mine which is nicestylesheet.com

I'm wondering, on the "about" page for example, in the <h1> tag, I've got "About NiceStylesheet."

Is it better to write it was "NiceStylesheet" or "Nice Stylesheet" (with a space) or does it even matter?

with the space, would be best practice

That's what I was thinking too and the reason I asked the question.

Thanks

yes I think you should deffinately use the spaces. I think you may have some problems if you do it the other way

Generally, use spaces to separate your words. Makes more sense that way.

However, it seems to me you're referring to your site. NiceStyleSheet.com, if so, might as well not use spaces for that.