We are starting a new website called recaplet.com and have

We are starting a new website called recaplet.com and have copied the theme from our website wellbuzz.com over to the new site. However, I can't figure out why the search button in the header at the top of the page is so large and pushed down to the next line (as compared to what it looks likes on wellbuzz.com). Can you please tell me how to fix this so that the search button on recaplet.com looks the same as the search button on wellbuzz.com.

I have granted support access via the WPMU wordpress plugin, in case that helps.

Thanks for your help.