Styling form

I’ve obviously lost the plot with this one.

I am using the Sitepoint Book ‘Art & Science of CSS’ to style a particular form. Everything appears to be OK until the 2nd Fieldset and Legend used in the form when the spacing goes awry.

See Bed Head Measurements

I’ve checked it in Firefox Web Developer and Examine Element and everything seems alright, but isn’t.

Any pointers, please.

My apologies on this - I’ve found the problem - I’d left some css instructions in a Spry Validation sheet. doh!