Text field not ready for input in IE

[jwpsv]

First of all: great extension! Was set-up very professional.

I've got a problem in the form using a field of the type 'text'. The problem occurs in Internet Explorer 7, not in Firefox and Safari. When you want type text into the text field, you have to click exactly on the beginning of the text field, which can be very difficult to achieve.
In Firefox and Safari you can click anywere on the text field, to input text.

My Joomla version is 1.5.15. The problem occurs in the templates: beez and rhuk_milkyway. And not in the template JA_Purity.

[jwpsv]

I think it has someting to do with the following CSS part (Bold):

.ckCSSinputnormal {
display: block;
float: left;
margin-top: 10px;
background:none;
}

When I disable this part, the problem is solved in IE:

.ckCSSinputnormal {
display: block;
float: left;
margin-top: 10px;
/*background:none*/;
}

I cannot explain why, because I'm not a CSS expert. This will be the solution for me.