dcloud, I used FireFox Web Developer Toolbar plugin to examine and edit your CSS in real time.
FireFox Web Developer Toolbar is a great tool for any webmaster to use:
This menu contains my favorite feature of the Web Developer Toolbar: Edit CSS. When you activate this feature, you can edit the CSS of a web page in a sidebar in real time and see your changes updated on the web page as you type them. For example, maybe you want to see what your site would look like with CSS changes just by editing the CSS in the sidebar. As soon as the sidebar is closed, the changes are discarded.
Another useful feature in the CSS menu is Disable External Styles which allows you to remove all the external CSS from a web page. It is good for troubleshooting if the theme or plugin is causing the problem.
Try this: edit your theme style.css and add this at the bottom:
label {display: inline;}
input {height: inherit;}