Absolutely Dan, Bang On!!!
this is the code i found
<span class="mktEditable" id="header1">[Edit Header 1]</span></span>
Can the [Edit Header] be removed? Will it cause any harm to the email send?
It shouldn't have to be removed - but rather replaced with actual "header 1" text (or the ALT text of the header image). Seems like this text remains even after adding a header image. Since it's within the editable region of the template, you should be able to remove it at the email level when creating each email. You might want to go back to your developer to let them know this is happening. Our logo was the first element here when we used the 1.0 templates - and therefore was always coded with ALT text of our company name and a sentence of what we do. This then appeared in the preheader text. Ideally this should be different for each email since it gives an indication to the user of what's contained without opening it.