dreamweaver and internet explorer

@dlacloche — since @cohen and @cwindham report no problem, this is most likely a small, IE-specific layout/markup difference between the pages rather than a browser-wide bug. Common causes for an unexplained vertical gap under a header image in IE are: a different document mode (missing/altered DOCTYPE or stray chars before it), margin-collapse on the first child (UL/OL default top margin), the image behaving as an inline element (baseline gap), or a tiny markup difference (an unclosed tag, an extra <p> or comment) introduced by the template editor.

A short, practical checklist that usually finds the issue:

• Compare the generated HTML for the working and broken pages (look for differences before the DOCTYPE and in the header area).
• Use IE’s developer tools (F12) to check Document Mode/Compatibility View and inspect the computed box model for the header image and the nav (look at margin-top on the nav and the image’s display/vertical-align).
• Validate the page markup to catch unclosed tags or stray elements that can change layout.

Quick CSS fixes to try (safe and reversible):

/* remove image baseline gap */
#header img { display: block; }

/* prevent nav default top margin and force containing layout in old IE */
#nav, #nav ul { margin-top: 0; padding-top: 0; }
#header { line-height: 0; overflow: hidden; zoom: 1; }

Notes: line-height:0 only affects inline text inside the header wrapper; zoom:1 is a harmless IE hasLayout trigger used in IE6/7. For background reading on the image baseline gap and margin collapsing, see the MDN docs on vertical-align and collapsing margins, and use the W3C validator to check markup:

vertical-align (MDN)
Collapsing margins (MDN)
W3C Validator